The Journal of Medical Investigation
Online ISSN : 1349-6867
Print ISSN : 1343-1420
ISSN-L : 1343-1420
Volume 63 , Issue 1.2
Showing 1-28 articles out of 28 articles from the selected issue
Reviews
  • Subash C. Jha, Kosaku Higashino, Toshinori Sakai, Yoichiro Takata, Mit ...
    2016 Volume 63 Issue 1.2 Pages 1-7
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    High-intensity zone (HIZ) was originally described as a high-intensity signal on T2-weighted magnetic resonance (MR) images, located in the posterior annulus fibrosus, clearly separated from the nucleus pulposus. Among symptomatic patients with low back pain, HIZ is present in 28-59% of cases. In morphologically abnormal discs, high sensitivity and specificity of 81% and 79%, respectively, were reported for HIZs and concordant pain during discography. In contrast, another report indicated low rates. Although most papers reported high sensitivity and specificity for this relationship, it remains controversial. Regarding the pathology of HIZs, inflammatory granulation tissues are found at sites showing HIZs. Such inflammatory tissues produce pro-inflammatory cytokines and mediators, which sensitize the nociceptors within the disc and cause pain. An effective treatment for this condition is yet to be established. Recently, minimally invasive surgery using percutaneous endoscopic discectomy (PED) under local anesthesia was introduced. After removal of the degenerated disc material, the HIZ is identified with the endoscope and then coagulated and modulated with a bipolar radio pulse. This technique is called thermal annuloplasty. In conclusion, HIZs is an important sign of painful intervertebral disc disruption, if identified precisely based on factors such as location and intensity. J. Med. Invest. 63: 1-7, February, 2016
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  • Subash C. Jha, Shoji Fukuta, Keizo Wada, Kosaku Higasino, Rui Amari-Ki ...
    2016 Volume 63 Issue 1.2 Pages 8-14
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    The management of cuff tear arthropathy (CTA) has always been a challenge for shoulder surgeons. Introduction of reverse total shoulder arthroplasty (RTSA) helped in providing pain relief and improved shoulder function in patients with CTA. In this study, we aimed to evaluate the short-term clinical results and some clinical details regarding the types of available prosthesis, positioning, and size of the components for RTSA in a population of short-stature female Japanese. In our seven cases, the average glenoid size was 23.9 mm in width and 34.2 mm in height. The average width was smaller than the size of all available baseplates. We implanted reverse shoulder prostheses with baseplate that measured 28 mm in diameter and two locking screws. The center of the baseplate was shifted to allow slight anterior overhang relative to the anatomical center to avoid breakage of the posterior cortex and to achieve firm fixation. One case of humeral shaft fracture occurred while inserting the humeral stem and required encircling wiring. In our experience, the short term clinical results of RTSA were excellent, but a new prosthesis that is designed to fit the short stature of Asians with smaller glenoid and humerus should be considered. J. Med. Invest. 63: 8-14, February, 2016
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  • Miyako Kishimoto, Mitsuhiko Noda
    2016 Volume 63 Issue 1.2 Pages 15-18
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    Linguistic, cultural, and geographical differences might challenge the management of diabetes patients travelling in a culturally and linguistically homogeneous country. This article presents an instructive case and identifies various factors that can help in effective diabetes management of such cases. A Russian female patient aged 23 came to Japan and visited our hospital for a second opinion regarding glycemic control. She was diagnosed with type 1 diabetes at age three and started insulin injections and diet therapy with carbohydrate counting methods. Her HbA1c level was 11.0% with multiple daily insulin injections. She showed neuropathy, nephropathy, and blindness due to her progressed retinopathy. Because of the language barrier, suggestions for lifestyle modification were not effectively conveyed to the patient. We analyzed possible barriers to effective diabetes management in such foreign patients. In addition to language barriers and difficulties in diet therapy, dissimilar diabetes treatment guidelines, inadequate healthcare insurance, and stress-inducing conditions can be barriers to effective diabetes management. Foreign diabetes patients might face several barriers in effective management while travelling in Japan. Use of medical interpreters, adequate medical insurance, and trained medical staff will help in overcoming these barriers. J. Med. Invest. 63: 15-18, February, 2016
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  • Minoru Sakama
    2016 Volume 63 Issue 1.2 Pages 19-26
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    On April 9 2015, the Letter article titled “Measurement of the first ionization potential of lawrencium, element 103” is now published at News and Views on Nature (2015) which has been performed by our remarkably Japanese colleagues of nuclear and radiochemistry at JAEA (Japan Atomic Energy Agency). In this review, the author will state that the isotope separator on-line (ISOL) our regularly used, one of mass separation techniques, with a thermal surface ionization makes possible for determining the ionization potential of lawrencium based on the fruitful fundations of developing the ISOL system until now and also ever studying searches for unknown nuclei and these nuclear decay properties around actinide region in the past 20 years. J. Med. Invest. 63: 19-26, February, 2016
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  • Keiko Kataoka
    2016 Volume 63 Issue 1.2 Pages 27-37
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    The role of the intestinal microbiota in human health is gaining more attention since clear changes in the composition of the intestinal bacteria or environment are seen in patients with inflammatory bowel disease, allergy, autoimmune disease, and some lifestyle-related illnesses. A healthy gut environment is regulated by the exquisite balance of intestinal microbiota, metabolites, and the host's immune system. Imbalance of these factors in genetically susceptible persons may promote a disease state. Manipulation of the intestinal microbiota with prebiotics, which can selectively stimulate growth of beneficial bacteria, might help to maintain a healthy intestinal environment or improve diseased one. In this review, analytical methods for identification of intestinal bacteria and an update on the correlation of the intestinal microbiota with human health and disease were discussed by introducing our recent studies to determine the prebiotic effects of a fiber-rich food in animal model and on healthy people and patients with ulcerative colitis (UC). J. Med. Invest. 63: 27-37, February, 2016
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Originals
  • Fusakazu Sawachika, Hirokazu Uemura, Sakurako Katsuura-Kamano, Miwa Ya ...
    2016 Volume 63 Issue 1.2 Pages 38-44
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    The purpose of this study was to investigate the changes in foot function, disease activity, and disability in patients with RA after resection arthroplasty of the forefoot (arthroplasty). Arthroplasty was performed on 11 patients with RA. All study patients underwent clinical assessment to measure disease activity (Disease Activity Score in 28 Joints-C-reactive protein, DAS28-CRP), disability (Health Assessment Questionnaire-Disability Index, HAQ-DI) and foot function (Foot Function Index, FFI) at the following stages: preoperatively and 1, 3, and 12 months after surgery. Following arthroplasty, foot function improved significantly, as assessed by FFI total and subscales (pain, disability, and limitation of activity) (P<0.001, P<0.001, P<0.001, and P=0.002, respectively). Disease activity was significantly improved in relation to DAS28-CRP and its subscales of number of swollen joints and patient global assessment (PtGA) (P=0.033, P=0.008, and P=0.038, respectively). There was no significant difference in disability, as assessed by the HAQ-DI and its subscale, HAQ-walking (P=0.150 and P=0.597, respectively). Foot function improved significantly after arthroplasty, and was maintained at 12 months postoperatively. Additionally, our study showed that disease activity and its subscale PtGA improved after arthroplasty. J. Med. Invest. 63: 38-44, February, 2016
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  • Seiji Iwamoto, Shoichiro Takao, Masafumi Harada
    2016 Volume 63 Issue 1.2 Pages 45-48
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    Purpose: This study was designed to identify the anatomical variations of lumbar arteries on contrast-enhanced multi-detector row computed tomography (MDCT). Materials and Methods: Consecutive 100 colon cancer patients underwent preoperative 3-dimensional navigation studies, which include CT colonography (CTC) and CT angiography (CTA) for evaluation of anatomical relationship between the colon cancer and mesenteric vasculatures. After exclusion of inappropriate cases, 84 cases (33 women and 51 men; mean age, 64 years) were finally analyzed. The visualization of lumbar arteries from the CTA was scored based on the agreement of two radiology specialists. Also the presence or absence of left and right common trunk of each lumbar artery was evaluated. Results: Visualization scores on both sides of L1 were significantly lower than those of L2-L4. No significant difference could be found on visualization of L1 lumbar arteries between the young and the elderly group. The common trunk tended to be in the lower lumbar levels (L1 in 2.4%, L2 in 9.5%, L3 in 11%, and L4 in 23%). Conclusion: The development and variation of lumbar arteries can be evaluated with CTA. Furthermore, CTA can provide sufficient anatomical information on variations of the lumbar arteries prior to surgery or catheterization. J. Med. Invest. 63: 45-48, February, 2016
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  • Naoko Takamatsu, Hiroyuki Nodera, Atsuko Mori, Keiko Maruyama-Saladini ...
    2016 Volume 63 Issue 1.2 Pages 49-53
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    The purpose of the present study was to elucidate the relative frequencies of fasciculations assessed by sonography in a large number of muscles in patients with amyotrophic lateral sclerosis (ALS). The patients diagnosed as having ALS were retrospectively assessed by muscle sonography. The frequencies of having fasciculations were compared among the 15 muscles and the subtypes according to the initially affected body region. Overall, approximately half of the muscles had fasciculations (48.8%), in the average of 11.4 muscles per patient. The frequency of fasciculations tended to be lower in the patients with longer disease durations upon testing. Biceps brachii had the highest frequency, followed by extensor digitorum communis, whereas sternocleidomastoid and rectus abdominis had the lowest frequencies. The frequencies of fasciculations were similar among the clinical subtypes. In conclusion, in patients with ALS, fasciculations were detected most frequently in proximal arm muscles by sonography, whereas truncal muscles had lower frequencies. Fasciculations tended to be less evident in the advanced disease stage, possibly reflecting muscle degeneration. Appropriate selection of muscles to observe fasciculations is important for diagnosis of ALS. J. Med. Invest. 63: 49-53, February, 2016
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  • Atsuko Mori, Hiroyuki Nodera, Naoko Takamatsu, Keiko Maruyama-Saladini ...
    2016 Volume 63 Issue 1.2 Pages 54-57
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    Morphological assessment of peripheral nerves in amyotrophic lateral sclerosis (ALS) has been available by sonography. Detection of possible axonal atrophy could be important in predicting progression. Research on correlation between sonographic findings and clinical presentation has been sparse. The aim of the study was to assess possible motor axon loss in patients with ALS by sonography and to correlate the imaging features with clinical subtypes. Patients with either definite or probable ALS and control subjects had sonographic evaluation of the cervical nerve roots (C5, C6, and C7). Each diameter and their sums were measured. The ALS patients were classified by their clinical onset and progression (arm-onset, leg-onset, bulbar, and flail-arm variant) and the sonographic features were compared. Overall, the cervical nerve roots were thinner in ALS than in the controls, but the diagnostic sensitivity was low. The patients with arm dysfunctions tended to show thinner nerve roots than those with normal or relatively preserved arm functions. The four ALS subtypes showed similar diameters of the nerve roots. There was no correlation between the disease duration and the diameters of the nerve roots. Sonography of the cervical nerve roots showed axonal atrophy in ALS and potentially reflects subtle arm dysfunctions. J. Med. Invest. 63: 54-57, February, 2016
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  • Hiroyuki Ohta, Masae Sakuma, Akitsu Suzuki, Yuuka Morimoto, Makoto Ish ...
    2016 Volume 63 Issue 1.2 Pages 58-62
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    Fibroblast growth factor 23 (FGF23) is a molecule involved in regulating phosphorus homeostasis. Although some studies indicated an association between serum FGF23 levels and sex, the association has not been fully investigated. The purpose of this study was to evaluate whether sex could influence FGF23 responsiveness to dietary phosphorus intake in healthy individuals. Thirty two healthy subjects between 21 and 28 years were recruited for this study. Subjects performed 24-hour urine collection and blood samples were collected. We estimated phosphorus intake (UC-P) from the urine collection (UC), and evaluated any association between UC-P and serum FGF23 levels. Subsequently, we compared serum FGF23 levels between males and females. Positive correlation was observed between UC-P and serum FGF23 levels. Serum FGF23 levels were significantly higher in males than in females. Serum FGF23 levels/UC-P was significantly higher in females than in males. There was no significant difference in serum FGF23 levels/UC-P/BW between the male and female groups. Our results indicate that there was no gender difference between FGF23 responsiveness to phosphorus intake per body weight. J. Med. Invest. 63: 58-62, February, 2016
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  • Yanfei Hou, Mutsumi Nakahashi, Kazuaki Mawatari, Takaaki Shimohata, Ta ...
    2016 Volume 63 Issue 1.2 Pages 63-67
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    The presence of antibiotics in the environment and their subsequent impact on the development of multi-antibiotic resistant bacteria has raised concerns globally. Consequently, much research is focused on a method to produce a better disinfectant. We have established a disinfectant system using UVA-LED that inactivates pathogenic bacteria. We assessed the bactericidal efficiency of a combination of UVA-LED and antibiotics against Vibrio parahaemolyticus. Combined use of antibiotic drugs and UVA irradiation was more bactericidal than UVA irradiation or antibacterial drugs alone. The bactericidal synergy was observed at low concentrations of each drug that are normally unable to kill the bacteria. This combination has the potential to become a sterilization technology. J. Med. Invest. 63: 63-67, February, 2016
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  • Masakazu Goto M.D., Hiroshi Okitsu M.D., Ph.D, Yasuhiro Yuasa M.D., Ph ...
    2016 Volume 63 Issue 1.2 Pages 68-73
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    The purpose of this study was to investigate the oncologic outcomes of laparoscopic distal gastrectomy (LDG) for advanced gastric cancer (AGC). Between April 2003 and March 2014, LDG was performed for 392 patients, 91 patients (23.2%) had histopathologically diagnosed AGC beyond T2 depth. The clinicopathological features, postoperative outcomes, mortality, morbidity, recurrence rate, and survivals of those patients were reviewed. The TNM stages of the tumor were IB in 26 patients (28.5%), IIA in 20 (21.9%), IIB in 18 (19.7%), IIIA in 13 (14.2%), IIIB in 6 (6.5%), IIIC in 6 (6.5%), and IV in 2 (2.1%). Major morbidity occurred in 14 patients (15.3%), with no postoperative mortality. Median follow-up was 24.5 months; 10 patients developed recurrence during the follow-up period, and 10 patients died, including 6 cancer deaths. The 5-year overall and disease-free survival rates were 76.8% and 72.6%, respectively. By stage, OS/DFS was 92.3%/91.8% in stage IB, 85.4%/85.4% in stage II, and 49.3%/26.9% in stage III. Oncologic outcomes were good in patients with AGC, especially with stage IB-IIB, who underwent LDG. LDG appears to be an effective approach for treating stage IB and II gastric cancer. J. Med. Invest. 63: 68-73, February, 2016
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  • Masanari Watanabe, Jun Kurai, Hiroyuki Sano, Hiroya Kitano, Eiji Shimi ...
    2016 Volume 63 Issue 1.2 Pages 74-79
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    Objectives: Few reports are available concerning the prevalence of asthma among snow crab workers in Japan. The object of this study was to estimate the prevalence of asthma and wheezes among Japanese snow crab workers and their associations with exhaled nitric oxide (FeNO) and YKL-40. Methods: Forty-nine snow crab workers enrolled in this study, which was cross-sectional by design and was conducted using a translated version of the European Community Respiratory Health Survey questionnaire. The levels of FeNO and serum YKL-40 were measured between September and October 2014. Results: The prevalences of current asthma and wheezes were 10.2% (95% CI, 3.4 to 22.2) and 12.2% (95% CI, 4.6 to 24.8), respectively. There was no association between these prevalences and the duration of snow crab employment. Six subjects' FeNO levels exceeded 50 ppb, and nine subjects' levels exceeded 25 ppb. Twelve subjects' (25.5%) serum YKL-40 levels exceeded 77.2 ng/mL, which was 2 standard deviations above the mean for healthy subjects. However, there were no significant relationships among the prevalences for asthma and wheezes, FeNO, and serum YKL-40. Conclusions: This study provides information concerning the prevalences of asthma and wheezes among Japanese snow crab processing workers. J. Med. Invest. 63: 74-79, February, 2016
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  • Michiko Kinoshita, Yasuo M. Tsutsumi, Kohei Fukuta, Asuka Kasai, Katsu ...
    2016 Volume 63 Issue 1.2 Pages 80-84
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    Purpose: Activation of the mitochondrial calcium-activated potassium (mKCa) channel reportedly confers resistance to myocardial ischemic stress. However, the role of the mKCa channel in postconditioning induced by volatile anesthetic remains unclear. Methods: Male Japanese white rabbits underwent coronary artery occlusion for 30 min followed by reperfusion for 3 h. Volatile anesthetic, isoflurane, was administered at 3 min prior to reperfusion for 5 min. Rabbits were injected with the mKCa channel blocker, iberiotoxin, or the mKCa channel opener, NS1619, at 8 min prior to reperfusion. Myocardial infarct size and the area at risk (AAR) were measured at the end of the experiment. Results: Isoflurane significantly reduced infarct size (23.0±9.8% of the AAR, P<0.05) compared with the control (44.0±9.1%). Iberiotoxin abolished the cardioprotective impact of isoflurane (43.0±11.6%), while iberiotoxin alone exerted no effect on infarct size (45.0±9.5%). NS1619 and isoflurane/NS1619 both significantly reduced infarct size (21.0±10.3% and 19.0±8.8%, respectively, P<0.05 vs control group), but isoflurane/NS1619 showed no additional benefits compared with isoflurane alone. Conclusion: These results indicate that activation of the mKCa channel contribute isoflurane-induced postconditioning. J. Med. Invest. 63: 80-84, February, 2016
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  • Kiyotaka Hasebe, Yu Okubo, Koji Kaneoka, Kohei Takada, Daisuke Suzuki, ...
    2016 Volume 63 Issue 1.2 Pages 85-90
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    Objectives: To ascertain the dynamic stretch effects of flexibility of the hamstrings on lumbar spine and pelvic kinematics. Background: Tight hamstrings are positively correlated with low back pain. However, it is unclear how flexibility of the hamstrings affects spino-pelvic rhythm. Methods: Twelve healthy men participated in the study. The straight leg raising (SLR) angle, finger floor distance (FFD), and spino-pelvic rhythm was measured before and after the 6-week stretching protocol. The forward bending task was divided into 4 phases. The paired t-test was used to determine significant differences before and after the FFD, SLR angle, lumbar motion, and pelvic motion, and spino-pelvic rhythm in each phase (p<0.05). Results: After 6 weeks of stretching, significant improvements were seen in the FFD with maximum forward bending and in the SLR angle. Total pelvic rotation was also significantly increased in contrast to total lumbar flexion. A decreased spino-pelvic ratio was seen in the final phase. Conclusion: Dynamic stretching could change the spino-pelvic rhythm to a pelvis-dominant motion, indicating that flexible hamstrings are important for preventing low back pain. J. Med. Invest. 63: 85-90, February, 2016
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  • Kozo Yoshikawa, Mitsuo Shimada, Jun Higashijima, Toshihiro Nakao, Masa ...
    2016 Volume 63 Issue 1.2 Pages 91-95
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    Background: The number of elderly patients with gastric cancer is continuing to increase along with the life expectancy of the general population. The purpose of this study was to investigate both the impact of age on postoperative outcome and the effect of limited lymph node dissection for elderly patients. Methods: Patients were classified into the following three groups: Group A, ≥80 years old (n=44); Group B, 70-80 years old (n=139); Group C, <70 years old (n=219). Postoperative complication and survival rates were compared between the three groups Results: Limited lymph node dissection was performed significantly more frequently in Group A. In terms of surgery-related complications, no significant difference was seen between groups. In terms of general related complications, the complication rate increased with age, from 4% in Group C to 13% in Group B and 14% in Group A (p<0.05 each). Although limited lymph node dissection was frequently performed in Group A, cancer-specific survival showed no significant difference in R0 patients. Conclusions: Limited lymph node dissection for gastric cancer did not affect the cancer-specific survival in elderly patients. J. Med. Invest. 63: 91-95, February, 2016
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  • Chiaki Moriwaki, Mari Haku
    2016 Volume 63 Issue 1.2 Pages 96-103
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    The aim of this study was to develop a Breastfeeding Support Scale for Couples (BSSC) and to examine its reliability and validity. The BSSC was designed to evaluate current state of mutual support necessary for breastfeeding from the perspective of wife as support recipient, and husband as support provider. Subjects were 324 wives who came for their 1-month postpartum checkup and their husbands. Valid responses obtained from 159 husbands (97.0%) and 303 wives (93.5%) were then subjected to analysis. The BSSC for husbands comprised of 10 questions and two factors, and a scale for wives comprised of 14 questions and three factors were ultimately created. Cronbach's alpha reliability coefficient ranged from 0.72 to 0.89 for all factors for both husbands and wives. The internal consistency and criterion-related validity of the scale were also confirmed. The model fitted the data satisfactory. Its reliability and validity were confirmed. The BSSC focused on mutual support among married couples, and may reveal new directions for breastfeeding support by shedding light on the differences in the perception of reciprocity support. The BSSC can evaluate couples and the appropriate support necessary for breastfeeding from the perspective of reciprocity support. J. Med. Invest. 63: 96-103, February, 2016
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  • Hiroyuki Nodera, Yuishin Izumi, Naoko Takamatsu, Ryuji Kaji
    2016 Volume 63 Issue 1.2 Pages 104-107
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    To explore suggestive evidence of focal proximal demyelination in multifocal motor neuropathy (MMN) without overt evidence of conduction block, we conducted sonographical assessment of cervical nerve roots in 9 MMN patients, 22 ALS patients, and 17 control subjects. The mean diameters of the C5 and C6 roots in MMN patients were significantly larger than those in ALS and controls, especially on the clinically dominant side. Although non-specific, sonography can be a potentially useful diagnostic procedure to support the diagnosis of MMN, even when overt conduction block is lacking. J. Med. Invest. 63: 104-107, February, 2016
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  • Masanari Watanabe, Jun Kurai, Hiroyuki Sano, Saeko Torai, Hirokazu Yan ...
    2016 Volume 63 Issue 1.2 Pages 108-113
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    Although adult asthma is attributable to occupational factors and asthma and rhinitis are related, relatively few studies have investigated the prevalence of occupational rhinitis based on occupation, and knowledge of occupational rhinitis in Japan is currently limited. The objective of this cross-sectional study was to estimate the prevalence of allergic rhinitis among Japanese nursing professionals with asthma. A postal survey was conducted from October to December 2013 using translated versions of the European Community Respiratory Health Survey for the prevalence of asthma and State of the Impact of Allergic Rhinitis on Asthma Control questionnaire for the prevalence of rhinitis. Of 4,634 Japanese nursing professionals, 497 subjects had asthma, and 270 of these 497 subjects had allergic rhinitis (54.3%; 95% confidence interval [CI], 49.7-58.7). Latex allergy was significantly associated with allergic rhinitis (odds ratio, 1.77; 95% CI, 1.21-2.60). There was no relationship between employment period and prevalent allergic rhinitis. The results of this study provide fundamental information regarding occupational health among Japanese nursing professionals, including the prevalence of allergic rhinitis among Japanese nursing professionals with asthma and latex allergy as a potential risk factor for prevalent allergic rhinitis. J. Med. Invest. 63: 108-113, February, 2016
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  • Mio Takayama, Masayuki Kashiwagi, Aya Matsusue, Brian Waters, Kenji Ha ...
    2016 Volume 63 Issue 1.2 Pages 114-118
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    The aim of the present study was to quantify neuropathological findings using image analysis software for the diagnosis of dementia in deceased who underwent forensic autopsy. Of the autopsies performed within 48 hours of death and excluding those of patients with head injury, thermal injury, heat stroke, or intracranial lesions, 8 were of autopsy cases clinically diagnosed with dementia and thus included in the dementia group (D). The non-dementia group (non-D) consisted of 6 deceased without dementia. To compare the D and non-D groups, 6 regions and 7 types of pathological findings were observed semi-quantitatively using 4 conventional stainings. Quantitative analysis of collected image data was performed using image analysis software. Semiquantitative analysis of senile plaques and neurofibrillary tangles was performed with Bielschowsky-Hirano's silver staining image data. An easy, simple, and effective quantification method of the pathological findings was achieved. However, no significant differences were observed between the two groups, and diagnosis of dementia by the quantification of pathological findings was not successful. Diagnosis of dementia using image data may be possible in future studies with an increased number of autopsies, and by utilizing staining techniques with higher specificity and sensitivity, such as immunohistochemical staining. J. Med. Invest. 63: 114-118, February, 2016
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Case reports
  • Subash C Jha, Toshinori Sakai, Mika Hangai, Akiko Toyota, Shoji Fukuta ...
    2016 Volume 63 Issue 1.2 Pages 119-121
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    Spondylolysis, a defect or stress fracture of the vertebral pars interarticularis, occurs most frequently in the lower lumbar spine and occasionally in the cervical spine, but is extremely rare in the thoracic spine. We report the case of a 17 year-old girl, an elite rhythmic gymnast, who reported with early-stage thoracic spondylolysis at T10 and T11 levels. Physicians should be aware that performance of unusual athletic movements, such as those by gymnasts, may lead to spondylolysis in rare locations. J. Med. Invest. 63: 119-121, February, 2016
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  • Kosuke Sugiura, Toshinori Sakai, Keisuke Adachi, Kazumasa Inoue, Satos ...
    2016 Volume 63 Issue 1.2 Pages 122-126
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    Fractures at the thoracolumbar junction are the most common spinal column fractures. Among type C fractures in the Arbeitsgemeinschaft für Osteosynthesefragen Spine Classification, cases with complete fracture-dislocations of the spinal column often result in a critical neurological deficit despite surgical treatment. We present a case of an 18-year-old man who had a complete fracture-dislocation of the T12 vertebral body and multiple injuries following high-energy trauma but no critical neurological deficits. Because of active bleeding in the left thoracic cavity, the patient underwent open reduction of the T12 vertebral body and anterior spinal fusion of the T11-L1 vertebral bodies via an anterior approach between the T9 and T10 ribs within 24 h of the accident. Four months postoperatively, the patient could ambulate independently, with a slight disturbance of light touch. At 6 months postoperatively, plain computed tomography scans showed bony union of the T12 vertebral body. We postulated two reasons for the absence of critical neurological dysfunction: (1) spontaneous spinal canal sparing because of the fracture of the right superior articular process in the L1 vertebral body and (2) fracture morphology, that is, a rotational fracture with mild to moderately strong shearing stress to the dura mater. J. Med. Invest. 63: 122-126, February, 2016
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  • Ryo Tanaka, Masato Ebine
    2016 Volume 63 Issue 1.2 Pages 127-130
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    We show for the first time that imaging of osteoarthritic subchondral bone with 99mTc-sestamibi (MIBI) may be a valuable diagnostic tool to assess the severity of subchondral sclerosis. This is a report on a patient who had osteoarthritis of both knees and where MIBI was accumulated in the lesion sites. Due to the accumulation of MIBI in the bone, we believe that excessive stress had been applied to the bone and microfractures had activated bone remodeling. Typically, MIBI accumulation is not observed in the bone, but MIBI is believed to exhibit high accumulation where there is an increased presence of osteoblasts and osteoclasts. Osteoclasts absorb calcium, consequently causing a depolarization of the mitochondrial membrane potential, which may decrease the ability to retain MIBI and enhance washout. Pathological examination of the tissues of this case confirmed an abundance of osteoclasts. This suggests that using MIBI may be useful for determining the increased presence of osteoblasts and osteoclasts. J. Med. Invest. 63: 127-130, February, 2016
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  • Shinji Kawaguchi, Shoji Fukuta, Takahiko Tsutsui, Tetsuya Matsuura, Na ...
    2016 Volume 63 Issue 1.2 Pages 131-134
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    Os acromiale is a rare anatomical variant that is caused by failure of fusion of the acromial apophysis and is usually asymptomatic. We report a case of impingement syndrome of the left shoulder secondary to unstable os acromiale, which was initially overlooked and confirmed only during arthroscopic examination. Arthroscopic excision of the unstable fragment was successful without residual dysfunction of the deltoid muscle. J. Med. Invest. 63: 131-134, February, 2016
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  • Kazuta Yamashita, Kosaku Higashino, Toshinori Sakai, Yoichiro Takata, ...
    2016 Volume 63 Issue 1.2 Pages 135-139
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    Percutaneous endoscopic discectomy (PED) is a minimally invasive spinal technique and has several advantages compared with open surgery. We describe repeat PED surgery for recurrent herniated nucleus pulposus (HNP). The patient was a 33-year-old handball high level player. Previously, he underwent transforaminal PED under local anesthesia for intracanalicular HNP at L4-5 level about 2 years ago. He could return to his original competitive level. Two years later, he felt low back and right leg pain again when he was playing handball. Magnetic resonance imaging revealed the recurrence of HNP at the same level. We conducted transforaminal PED again using the exact same route as the previous surgery. Although there was a little adhesion around the L5 nerve root, we could easily identify and remove the herniated mass using endoscopic forceps. Immediately after the surgery, the low back and leg pain disappeared. Repeat PED surgery for recurrence of lumbar disc herniation is effective especially for athletes because of the benefits of PED, including surgery under local anesthesia, preservation of normal posterior structures, less postoperative pain, early discharge, and faster return to sports. J. Med. Invest. 63: 135-139, February, 2016
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  • Kenichi Suga, Miki Inoue, Akemi Ono, Tomomasa Terada, Masami Kawahito, ...
    2016 Volume 63 Issue 1.2 Pages 140-143
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    Severe-type Kawasaki disease (KD) complicated by serious myocarditis and encephalopathy can be successfully treated without abnormality of the coronary arteries by steroid pulse treatment and intravenous immunoglobulin (IVIg). A 4-year-old Japanese girl was diagnosed with KD due to a 6-day history of fever, rash, flushed lips, conjunctival hyperemia, palmar edema, and cervical lymphadenopathy. The day after initiation of IVIg and aspirin, cardiac gallop rhythm was identified. Cardiac ultrasonography revealed severe left ventricular dysfunction. Disturbance of consciousness, hallucinations, and slurred speech were also observed. Magnetic resonance imaging showed no abnormalities, but electroencephalography revealed high-voltage slow waves. Despite this serious disease, cardiac function and neurological abnormalities showed complete recovery without dilatation of the coronary arteries by steroid pulse treatment and additional IVIg. Follow-up at 15 months revealed no abnormality of the coronary arteries. In conclusion, we suggest that early combined treatment with steroid and IVIg is effective for serious KD complicated by myocarditis and encephalopathy. J. Med. Invest. 63: 140-143, February, 2016
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  • Takanori Miyoshi, Riho Mori, Sachiko Amano, Hiroyuki Sumitomo, Mariko ...
    2016 Volume 63 Issue 1.2 Pages 144-148
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    The synchronous existence of lung cancer and gastrointestinal stromal tumors (GIST) is considered to be extremely rare. To the best of our knowledge, this is the first report about the treatment of lung cancer and GIST with two kinds of molecular targeting drugs. An 83-year-old woman with a rectal GIST, which carried a c-kit mutation, and pulmonary adenocarcinoma, which exhibited an epidermal growth factor receptor (EGFR) mutation, was treated alternately with imatinib and erlotinib. Good control over both diseases was achieved for two years. The present case is not only of interest due to the rare co-occurrence of GIST and lung cancer, but also because it involved two tumors carrying different gene mutations, and both tumors were brought under control using different molecular targeting drugs. J. Med. Invest. 63: 144-148, February, 2016
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  • Hiroaki Toba, Shoji Sakiyama, Hiromitsu Takizawa, Akira Tangoku
    2016 Volume 63 Issue 1.2 Pages 149-151
    Published: 2016
    Released: April 01, 2016
    JOURNALS FREE ACCESS
    Background: Gefitinib and/or erlotinib-induced hepatotoxicity sometimes lead to treatment failure in EGFR mutation-positive patients with non-small cell lung cancer (NSCLC), even though the therapeutic effect is evident. Cases: Here, we report three postoperative NSCLC patients with recurrences who experienced severe hepatotoxicity while receiving gefitinib and/or erlotinib treatment but could be safely switched to afatinib treatment. Conclusion: Afatinib could be a well-tolerated EGFR-TKI that could be chosen for its relatively low hepatotoxicity, which is attributable to its having a different metabolic mechanism compared to other EGFR-TKIs. J. Med. Invest. 63: 149-151, February, 2016
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