Internal Medicine
Online ISSN : 1349-7235
Print ISSN : 0918-2918
ISSN-L : 0918-2918
Volume 55 , Issue 23
Showing 1-28 articles out of 28 articles from the selected issue
ORIGINAL ARTICLES
  • Kazuyuki Ozaki, Takeshi Okubo, Komei Tanaka, Yukio Hosaka, Keiichi Tsu ...
    2016 Volume 55 Issue 23 Pages 3413-3420
    Published: December 01, 2016
    Released: December 01, 2016
    JOURNALS OPEN ACCESS

    Objective Left ventricular outflow tract (LVOT) obstruction is a complication in 15-25% of patients with Takotsubo cardiomyopathy and sometimes leads to catastrophic outcomes, such as cardiogenic shock or cardiac rupture. However, the underlying mechanisms have not been clarified.

    Methods and Results We experienced 22 cases of Takotsubo cardiomyopathy during 3 years, and 4 of these 22 cases were complicated with LVOT obstruction in the acute phase (mean age 79±5 years, 1 man, 21 women). The LVOT pressure gradient in the acute phase was 100±17 mmHg. Transthoracic echocardiogram (TTE) revealed left ventricular hypertrophy (LVH) in one case and sigmoid-shaped septum without LVH in three cases. The complete resolution of the LVOT obstruction was achieved in a few days with normalization of the left ventricular wall motion following administration of beta-blockers. A dobutamine provocation test after normalization of the left ventricular wall motion reproduced the LVOT obstruction in all cases and revealed the presence of latent LVOT obstruction.

    Conclusion The manifestation of latent LVOT obstruction in the acute phase of Takotsubo cardiomyopathy is one potential reason for the complication of LVOT obstruction with Takotsubo cardiomyopathy.

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  • Hyuma Daidoji, Yoshiaki Tamada, Saya Suzuki, Ken Watanabe, Taku Shikam ...
    2016 Volume 55 Issue 23 Pages 3421-3426
    Published: December 01, 2016
    Released: December 01, 2016
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    Objective Percutaneous transluminal renal artery angioplasty (PTRA) has been recommended for the treatment of renovascular resistant hypertension. However, large randomized trials have reported that PTRA did not improve the outcomes compared with optimal medical therapy in patients with renal artery stenosis (RAS). It is important to identify patients with renovascular hypertension who are likely to respond to PTRA. We herein examined whether or not the plasma renin activity (PRA) could predict the improvement in resistant hypertension after PTRA for RAS.

    Methods and Results A total of 40 patients (mean age: 63±15 years) with unilateral RAS who received PTRA for resistant hypertension were enrolled in this study. Twenty-two (55%) patients experienced a significant reduction in their blood pressure while using few antihypertensive agents at the 3-month follow up. The median PRA was significantly higher in patients using few antihypertensive agents than in those using more [4.2 ng/mL/hr, interquartile range (IQR) 2.6-8.0 vs. 0.8 ng/mL/hr, IQR 0.4-1.7, p<0.001]. To predict the improvement in hypertension after PTRA, a receiver operating characteristic analysis determined the optimal cut-off value of PRA to be 2.4 ng/mL/hr. A multivariate logistic regression analysis showed that higher PRA (>2.4 ng/mL/hr) was an independent predictor of the improvement in hypertension after PTRA (odds ratio: 22.3, 95% confidence interval: 2.17 to 65.6, p<0.01).

    Conclusion These findings suggest that the evaluation of preoperative PRA may be a useful tool for predicting the improvement in resistant hypertension after PTRA for patients with RAS.

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  • Naro Ohashi, Shinsuke Isobe, Sayaka Ishigaki, Takahisa Suzuki, Daisuke ...
    2016 Volume 55 Issue 23 Pages 3427-3433
    Published: December 01, 2016
    Released: December 01, 2016
    JOURNALS OPEN ACCESS

    Objective Hypertension and diurnal blood pressure (BP) variation are widely accepted as risk factors for renal damage. However, the effects of unilateral nephrectomy on BP and its circadian rhythm have not yet been clarified in patients with a compromised renal function, including dialysis patients.

    Methods We investigated 22 unilateral nephrectomized patients (16 men and 6 women, age: 64.5±14.3 years). The function of the circulating renin-angiotensin system (RAS) (plasma renin activity and plasma angiotensin II) and 24-h ambulatory BP monitoring (ABPM) were evaluated before and after nephrectomy. Daytime and nighttime 24-h ABPM values were determined based on sleep and waking times.

    Results In non-dialysis patients, the estimated glomerular filtration rate after nephrectomy was significantly lower than that before (before, 62.4±23.2 mL/min/1.73 m2 vs. after, 43.7±16.8 mL/min/1.73 m2; p<0.01). No significant differences were noted in the levels of BPs and circulating RAS before and after nephrectomy. However, the night-to-day (N/D) ratio of systolic BP (SBP) was significantly higher after nephrectomy than before (before, 93.3±6.5% vs. after, 98.4±6.9%; p<0.01), and the patterns of circadian BP rhythm also significantly differed before and after nephrectomy (p=0.022). Namely, the rates of dipper patterns decreased and nondipper and riser patterns increased after nephrectomy. In contrast, in dialysis patients, no significant differences were observed in the N/D ratio of SBP or the patterns of circadian BP rhythm before and after nephrectomy.

    Conclusion Unilateral nephrectomy affects the circadian rhythm of BP but not absolute values of BP.

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  • Hirotaka Arae, Masao Tateyama, Hideta Nakamura, Daisuke Tasato, Kaoru ...
    2016 Volume 55 Issue 23 Pages 3435-3440
    Published: December 01, 2016
    Released: December 01, 2016
    JOURNALS OPEN ACCESS

    Objective Recently, tenofovir disoproxil fumatate (TDF)-related side effects, such as renal nephrotoxicity and reduction of bone mineral density, have been reported. Consequently, increased switching from fixed-dose tablet TDF and emtricitabine (TDF/FTC) to abacavir and lamivudine (ABC/3TC) has occurred. Interestingly, while TDF has a lipid-lowering property, one of the ABC-related side effects is hyperlipidemia. Therefore, such switching could cause lipid elevation. To evaluate the change in lipid levels associated with switching from TDF/FTC to ABC/3TC in virologically-suppressed human immunodeficiency virus (HIV)-infected patients.

    Methods This is a retrospective, single-center study. We included the HIV-infected patients whose therapy included a drug switch from TDF/FTC to ABC/3TC between September 2009 and December 2012 at Ryukyu University Hospital. The exclusion criteria were HIV-RNA >40 copies/mL on the switching day, and a documented therapy change to a lipid-lowering agent or any other antiretroviral agents within 3 months before or after switching. We compared the low-density lipoprotein (LDL), high-density lipoprotein (HDL), total cholesterol (TC), and triglyceride (TG) levels before switching to three months after.

    Results A total of 18 patients met the inclusion criteria. The LDL, HDL, and TC levels significantly increased three months following the switch (p<0.05), with median (interquartile range) values of 17 (7, 32), 6 (2, 13), and 27 (10, 45) mg/dL, respectively. The TG values did not markedly change.

    Conclusion Switching from TDF/FTC to ABC/3TC resulted in significantly increased LDL, HDL, and TC levels.

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CASE REPORTS
  • Jin Imai, Takayoshi Suzuki, Marie Yoshikawa, Makiko Dekiden, Hirohiko ...
    2016 Volume 55 Issue 23 Pages 3441-3444
    Published: December 01, 2016
    Released: December 01, 2016
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    Dyskeratosis congenita (DC) is a rare inherited disease in which the telomere complex cannot be maintained. Shortened telomeres can cause a number of clinical conditions. We herein report a case of unrelated bone marrow transplantation due to aplastic anemia associated with DC. The patient died of uncontrollable refractory intestinal bleeding. Three cases of DC with life-threatening hemorrhaging after transplantation have been reported; however, the bleeding origin could not be determined. Our case is the only patient in which a gastrointestinal bleeding point, jejunal multiple angioectasia, was determined.

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  • Shin Kato, Hideki Mori, Moriya Zakimi, Koki Yamada, Kenji Chinen, Masa ...
    2016 Volume 55 Issue 23 Pages 3445-3452
    Published: December 01, 2016
    Released: December 01, 2016
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    An epidermoid cyst arising within an intrapancreatic accessory spleen (ECIAS) is rare, and also difficult to correctly diagnose before surgery. It is mostly misdiagnosed as a cystic tumor, such as a mucinous cystic neoplasm or as a solid tumor with cystic degeneration, such as a neuro endocrine tumor. We herein report a case of ECIAS and also perform a literature review of 35 reports of ECIAS. Although the preoperative diagnosis of ECIAS using conventional imaging is relatively difficult to make, careful preoperative examinations of the features on computed tomography and magnetic resonance imaging could lead to a correct preoperative diagnosis of ECIAS which might thereby reduce the number of unnecessary resections.

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  • Norihiro Ashihara, Koji Nakajima, Yoshiyuki Nakamura, Mutsuhiro Kobaya ...
    2016 Volume 55 Issue 23 Pages 3453-3457
    Published: December 01, 2016
    Released: December 01, 2016
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    Hypercalcemia resulting in the elevation of serum parathyroid hormone-related protein (PTHrP) and suppression of serum PTH was observed in a patient with advanced cholangiocarcinoma (CCC) and multiple lymph node metastases. We confirmed humoral hypercalcemia of malignancy based on PTHrP-producing CCC. Chemotherapy with gemcitabine and cisplatin could not control the patient's serum PTHrP levels and the patient was affected with bisphosphonate-refractory hypercalcemia. We administered a single dose of denosumab, an anti-receptor activator of nuclear factor-kappaB ligand monoclonal antibody, and the patient's serum calcium levels remained close to the normal range for approximately 3 weeks without additional treatment.

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  • Atsushi Mizuno, Yuka Morita, Sokun Fuwa, Hiroko Arioka, Yumi Harano, K ...
    2016 Volume 55 Issue 23 Pages 3459-3463
    Published: December 01, 2016
    Released: December 01, 2016
    JOURNALS OPEN ACCESS

    Renal arteriovenous fistula (AVF) is an uncommon anomaly characterized by the communication between renal arteries and veins. Renal AVFs are often asymptomatic but are occasionally accompanied by hematuria or heart failure. Transcatheter closure with embolization is a safe and effective treatment for renal AVF. We herein report an 87-year-old patient with heart failure due to renal AVF who was treated by transcatheter embolization. She developed bacteremia with hydronephrosis, which is a rare complication following the embolization of renal AVF.

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  • Kenta Hachiya, Kazuaki Wakami, Atsuhiro Yoshida, Hisao Suda, Nobuyuki ...
    2016 Volume 55 Issue 23 Pages 3465-3469
    Published: December 01, 2016
    Released: December 01, 2016
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    We herein report an unusual case of an infected descending aortic pseudoaneurysm with luminal pathognomonic oscillating vegetation with serological findings and clinical features mimicking anti-proteinase 3-antineutrophil cytoplasmic antibody-associated vasculitis. The positive blood cultures and imaging findings, including a pseudoaneurysm and vegetations in the aorta, suggested the presence of an infected aortic aneurysm. The patient was successfully treated with antibiotics and endovascular aortic repair. A precise diagnosis is crucial in order to avoid inappropriate therapy such as immunosuppressive treatment, which could result in life-threatening consequences in a patient with an infected aortic aneurysm.

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  • Shin-ichi Tsuda, Kazunori Konishi, Toshiki Otoda, Takako Nagai, Ai Tak ...
    2016 Volume 55 Issue 23 Pages 3471-3473
    Published: December 01, 2016
    Released: December 01, 2016
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    An impaired ability to sense and respond to drug-induced hypoglycemia is a common and serious complication in diabetic patients. The hypothalamic-pituitary-adrenal (HPA) axis activity plays a critical role in the counterregulatory response to hypoglycemia. We herein report a case that experienced restoration of a blunted HPA axis by avoiding hypoglycemia with the use of the DPP-4 inhibitor sitagliptin.

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  • Homare Shimohata, Yujiro Ogawa, Hiroshi Maruyama, Kouichi Hirayama, Ma ...
    2016 Volume 55 Issue 23 Pages 3475-3478
    Published: December 01, 2016
    Released: December 01, 2016
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    Fabry disease is a lysosomal storage disorder caused by a deficiency of α-galactosidase A. This disease is classified into two types, namely a classical and variant type. We herein present the case of a 36-year-old man who showed a renal variant of Fabry disease and was diagnosed at an early stage by the presence of mulberry cells. He had no history of general symptoms except for proteinuria. The presence of mulberry cells caused us to suspect Fabry disease and he was thereafter diagnosed to have a renal variant of Fabry disease based on the findings of a renal biopsy, a mutation analysis and a low level of α-galactosidase A activity.

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  • Akihiro Ryuge, Yasuhiko Ito, Taishi Yamakawa, Hitoshi Tanaka, Hirotosh ...
    2016 Volume 55 Issue 23 Pages 3479-3484
    Published: December 01, 2016
    Released: December 01, 2016
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    Legionella pneumophila is a cause of community-acquired pneumonia that is reported to induce electrolyte disorders, including hyponatremia, hypokalemia, and hypophosphatemia. We herein report two Japanese men with Legionella pneumonia and hyponatremia and hypophosphatemia. These findings were associated with an elevation of urinary low-molecular-weight tubular protein, including urinary β2-microglobulin, N-acetyl-β-D-glucosaminidase, the fractional excretion of phosphate and uric acid, and the presence of glycosuria and panaminoaciduria, suggesting that their electrolyte disorders had been caused by Fanconi syndrome. In these two cases, hyponatremia was probably due to salt wasting. Electrolyte disorders caused by Legionella pneumonia are corrected by treatment of the primary disease and fluid administration.

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  • Kazuya Hirai, Naoto Miura, Masabumi Yoshino, Kanyu Miyamoto, Hironobu ...
    2016 Volume 55 Issue 23 Pages 3485-3489
    Published: December 01, 2016
    Released: December 01, 2016
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    We herein report two cases of proteinase 3-anti-neutrophil cytoplasmic antibody (PR3-ANCA)-related nephritis in infectious endocarditis. In both cases, the patients were middle-aged men with proteinuria and hematuria, hypoalbuminemia, decreased kidney function, anemia, elevated C-reactive protein (CRP) levels, and PR3-ANCA positivity. Each had bacteremia, due to Enterococcus faecium in one and Streptococcus bovis in the other. One patient received aortic valve replacement therapy for aortic regurgitation with vegetation, and the other underwent tricuspid valve replacement therapy and closure of a ventricular septic defect to treat tricuspid regurgitation with vegetation. These patients' urinary abnormalities and PR3-ANCA titers improved at 6 months after surgery following antibiotic treatment without steroid therapy.

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  • Shungo Yukumi, Hideaki Suzuki, Masamitsu Morimoto, Hisayuki Shigematsu ...
    2016 Volume 55 Issue 23 Pages 3491-3493
    Published: December 01, 2016
    Released: December 01, 2016
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    Pneumothorax associated with thoracic endometriosis (TE) generally occurs in women around 30 years old and it usually affects the right pleural cavity. We herein report two cases of TE associated with left-sided pneumothorax in young women. The prevalence of TE in younger patients may be underestimated if these cases are treated as spontaneous pneumothorax. Pneumothorax occurring in younger patients has not been reported to show laterality. TE-related or catamenial pneumothorax in young women must therefore represent a different clinical entity from the condition seen in older patients.

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  • Toshiki Yamada, Yasuhito Nannya, Masahito Shimizu, Mitsuru Seishima, H ...
    2016 Volume 55 Issue 23 Pages 3495-3497
    Published: December 01, 2016
    Released: December 01, 2016
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    Nilotinib is a selective tyrosine kinase inhibitor for the treatment of Philadelphia chromosome-positive leukemias. An elevation of the pancreatic enzyme level is one of the major adverse events associated with nilotinib, but whether or not nilotinib induces symptomatic pancreatitis remains to be elucidated. The cases of two chronic myeloid leukemia patients treated with nilotinib who developed symptomatic acute pancreatitis on the third and fifth day of nilotinib administration are herein presented. Since both patients had no other etiologies for pancreatitis, nilotinib was considered to be the causal agent. The withdrawal of nilotinib resulted in a prompt recovery. These cases underline the importance of recognizing pancreatitis as a possible adverse event associated with nilotinib.

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  • Masuho Saburi, Masao Ogata, Takako Satou, Natsumi Yoshida, Kentaro Nag ...
    2016 Volume 55 Issue 23 Pages 3499-3504
    Published: December 01, 2016
    Released: December 01, 2016
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    A 41-year-old man was referred to our hospital for treatment of anaplastic lymphoma kinase (ALK)-negative anaplastic large cell lymphoma. Chronic active Epstein-Barr virus (CAEBV) was diagnosed based on the findings of elevated EBV antibody titers and positive EBV-DNA in the peripheral blood, and cord blood stem cell transplantation (CBT) was performed. The EBV-DNA levels in the blood fell below the limit of detection. His lymphoma relapsed on Day 165 with the appearance of eruptions, which disappeared after the withdrawal of tacrolimus. One year after transplantation, there were no signs of recurrence. This encouraging result suggests that CBT should be considered for adult cases of CAEBV with aggressive clinical manifestations.

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  • Atsushi Kitazawa, Hideo Misawa, Katsuhiro Nagahori, Ryo Koda, Atsunori ...
    2016 Volume 55 Issue 23 Pages 3505-3509
    Published: December 01, 2016
    Released: December 01, 2016
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    We report a case of acquired factor V inhibitors (AFVIs) in a patient with end-stage renal disease receiving warfarin therapy for atrial fibrillation. A 72-year-old Japanese man was admitted to our hospital complaining of tarry stools and abdominal pain. The laboratory findings revealed eosinophilia (52.1%), prolonged activated partial thromboplastin time (APTT) (98 s), PT (84 s), a factor V (FV) activity of <3%, and an FV inhibitor level of 6 Bethesda units/mL. After administration of prednisolone was started, his coagulation findings improved. However, his renal failure progressed, and he ultimately required chronic hemodialysis. This is the first case of AFVIs in a patient starting hemodialysis for end-stage renal disease.

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  • Hisashi Ito, Tetsumasa Kamei, Sanae Odake, Masayuki Nakano, Riki Okeda ...
    2016 Volume 55 Issue 23 Pages 3511-3513
    Published: December 01, 2016
    Released: December 01, 2016
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    Respiratory insufficiency is a critical problem in amyotrophic lateral sclerosis (ALS) patients. We herein present the case of an autopsied patient with sporadic ALS who underwent diaphragm pacing (DP). The pathology showed several localized adhesions with a markedly atrophied diaphragm. A marked loss of motor neurons with Bunina bodies and phosphorylated TDP-43 positive inclusions was found in the spinal cord and primary motor cortex. Mild hyalinization and a few multinucleated giant cells were present around the electrode tracks in the diaphragm. However, no infiltration of inflammatory cells was detected. Our findings suggest that full-time DP might not cause severe damage to adjacent diaphragm tissue.

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  • Wataru Kakuda, Ryo Momosaki, Naoki Yamada, Masahiro Abo
    2016 Volume 55 Issue 23 Pages 3515-3519
    Published: December 01, 2016
    Released: December 01, 2016
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    Structural and functional abnormalities of the prefrontal cortex seem to correlate with fatigue in patients with chronic fatigue syndrome (CFS). We consecutively applied facilitatory high-frequency repetitive transcranial magnetic stimulation (rTMS) to the dorsolateral prefrontal cortex (DLPFC) of seven CFS patients over three days. Five patients completed the 3-day protocol without any adverse events. For the other two patients, we had to reduce the stimulation intensity in response to mild adverse reactions. In most of the patients, treatment resulted in an improvement of fatigue symptoms. High-frequency rTMS applied over the DLPFC can therefore be a potentially useful therapy for CFS patients.

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  • Yuichi Suwa, Naoki Suzuki, Temma Soga, Ryuhei Harada, Aya Shibui, Hiro ...
    2016 Volume 55 Issue 23 Pages 3521-3524
    Published: December 01, 2016
    Released: December 01, 2016
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    Sporadic inclusion body myositis (sIBM) is a chronic progressive myopathy characterized by muscle weakness of both the quadriceps femoris and finger flexors. We herein present the case of a typical male patient with sIBM, which manifested as the isolated weakness of the finger flexors three years after the disease onset. We have identified several patients with sIBM in our cohort with muscle weakness of the flexors but not the quadriceps femoris. Examination of the flexor digitorum profundus muscle is important for the early and proper diagnosis of sIBM, even if a patient only presents with isolated finger flexor muscle weakness.

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  • Yuji Kato, Takeshi Hayashi, Satoko Mizuno, Yohsuke Horiuchi, Masayuki ...
    2016 Volume 55 Issue 23 Pages 3525-3528
    Published: December 01, 2016
    Released: December 01, 2016
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    We encountered two patients with sumatriptan-induced reversible cerebral vasoconstriction syndrome (RCVS). The present patients were taking sumatriptan for the first time because they had been tentatively diagnosed with a migraine. On reviewing the literature, we found nine other cases of triptan-induced RCVS, predominantly among women aged 30 to 40 years. RCVS has been precipitated by triptan at the first ever use, after daily use, and even with long-term use at a normal dose. Patients with acute onset of severe headache should be thoroughly evaluated, and triptan should be administered appropriately. If triptan-induced RCVS is suspected, vascular imaging should be repeated after several days.

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  • Junichiro Ohira, Nobuyuki Mori, Shunsuke Kajikawa, Takeshi Nakamura, T ...
    2016 Volume 55 Issue 23 Pages 3529-3533
    Published: December 01, 2016
    Released: December 01, 2016
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    Posterior reversible encephalopathy syndrome (PRES) typically affects the posterior subcortical white matter. We report the case of a 55-year-old man with atypical PRES, who had malignant hypertension and renal dysfunction. Magnetic resonance imaging of the brain revealed extensive vasogenic edema in the deep white matter including the temporal pole, as well as in the brainstem and cerebellum. Antihypertensive therapy and hemodialysis contributed to both clinical and radiological improvement. Involvement of the deep white matter including the temporal pole, which is rarely affected in an ischemic stroke, should be recognized as a potential sign of PRES.

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  • Takahiko Fukuchi, Sadao Kawasaki, Hiroki Hayashi, Daisuke Koreeda, Tak ...
    2016 Volume 55 Issue 23 Pages 3535-3538
    Published: December 01, 2016
    Released: December 01, 2016
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    An 82-year-old Japanese man, who presented with a fever and abdominal pain, was admitted to our hospital. According to enhanced computed tomography images, the probable diagnosis was abdominal aortic mycotic aneurysm. Eight sets of blood cultures obtained from the patient were negative. Despite administering treatment with vancomycin and ceftriaxone, the aneurysm progressively enlarged. He underwent open debridement surgery and in situ replacement because of an aneurysmal rupture. Bacteroides fragilis was isolated from the tissue culture of the aortic wall. Metronidazole was administered and discontinued without any infection relapse. When faced with similar cases, rare pathogens should thus be considered as possible causes of mycotic aneurysms.

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  • Kosuke Matsui, Akitsugu Furumoto, Kojiro Ohba, Kota Mochizuki, Takeshi ...
    2016 Volume 55 Issue 23 Pages 3539-3542
    Published: December 01, 2016
    Released: December 01, 2016
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    A 77-year-old man with urinary tuberculosis developed post renal anuria two days after starting an anti-tuberculosis drug regimen. He had bilateral hydronephrosis, and his right kidney was radiologically diagnosed to be non-functioning. A transurethral catheter was placed in the left ureter. No improvement in the ureteral stricture was noted during the initial three weeks of treatment; however, the stricture did thereafter improve after the commencement of oral prednisolone. In cases of urinary tuberculosis, ureteral stricture can deteriorate and result in ureteral obstruction during anti-tuberculosis treatment. Pre-emptive administration of corticosteroids may be beneficial for preventing such stricture in patients with a pre-existing ureteral lesion.

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