The Japanese Journal of Urology
Online ISSN : 1884-7110
Print ISSN : 0021-5287
ISSN-L : 0021-5287
Volume 111, Issue 1
Displaying 1-6 of 6 articles from this issue
Original Articles
  • Hiroshi Shimura, Nozomu Watanabe, Kenzo Nakamura, Takuji Tsukamoto, Yu ...
    2020 Volume 111 Issue 1 Pages 1-8
    Published: January 20, 2020
    Released on J-STAGE: January 20, 2021

    (Objective) Recently, lower urinary tract symptoms (LUTS) were reported to be associated with endothelial dysfunction. Endothelial function is non-invasively measured by flow-mediated dilation (FMD). As tadalafil has the potential to improve atherosclerosis, we evaluated the relationship between LUTS and endothelial function using FMD, and the effects of tadalafil.

    (Patients and methods) We conducted FMD examinations for a total of 122 males, and analyzed its association with IPSS, OABSS, and cardiovascular risks. Furthermore, 21 BPH patients received 5 mg of tadalafil per day for one year. We defined the Low FMD group as FMD < 3.9% and the Control group as other values, and compared the effects of tadalafil between groups.

    (Results) In the 122 male patients, FMD was negatively correlated with nocturia and OABSS. Patients with hypertension or coronary artery disease had a lower FMD than those without.

    In the tadalafil administration study, the Low FMD group achieved greater improvement of IPSS, OABSS and FMD than the Control group.

    (Conclusion) FMD examination revealed that endothelial dysfunction is closely associated with LUTS in males, and that tadalafil is effective for patients with endothelial dysfunction.

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  • Yushi Naito, Hideyuki Kanazawa, Yurika Okada, Jun Nagayama, Norie Syo, ...
    2020 Volume 111 Issue 1 Pages 9-15
    Published: January 20, 2020
    Released on J-STAGE: January 20, 2021

    (Objectives) The Enhanced Recovery After Surgery (ERAS) protocols are standardized and multimodal perioperative care pathways designed to improve surgical outcomes by minimizing stress response and inflammation following surgery. First adopted in colorectal surgery, ERAS is now being employed in various other types of surgeries, most recently in patients undergoing radical cystectomy (RC). Implementation of ERAS protocols resulted in reductions in perioperative complication rates and length of hospital stay (LOS). However, information on the adoption of ERAS in patients undergoing RC in Japan is limited. The objective of this study was to evaluate the safety and efficacy of ERAS implemented in the Toyohashi Municipal Hospital in 2017 for the management of patients with RC.

    (Patients and methods) This was a retrospective study of 103 patients who underwent RC and urinary diversion from January 2012 to March 2019. Of the 103 patients, 71 underwent surgery prior to the introduction of the ERAS were allocated to the 'traditional' group, while 32 were exposed to the ERAS protocol were allocated to the 'ERAS' group. In this study, ERAS included no bowel preparation, preoperative carbohydrate loading, preoperative fluid reduction, preoperative fasting, reduced drainage use, no nasogastric intubation, and early postoperative drinking and eating. A comparative analysis was performed to evaluate LOS and postoperative complication rate (Clavien classification ≥2) after RC between the 'traditional' and 'ERAS' groups.

    (Results) Patient characteristics and intraoperative variables such as median age, sex, body mass index, clinical and pathological cancer stage, amount of bleeding, need for transfusion, and technique of urinary diversion did not differ between groups. However, duration of surgery was significantly shorter in the ERAS group than in the traditional group (402 min vs. 470 min; P = 0.03). Further, rate of complication was significantly lower (43.8% vs. 67.6%; P=0.03) and LOS after RC was significantly shorter (21 days vs. 28 days; P<0.001) in the ERAS group compared to the traditional group. Moreover, ERAS was an independent factor affecting shorter LOS after RC (OR, 5.22; 95% CI, 1.52-17.90; P = 0.009) in multivariate analyses.

    (Conclusions) It is possible that the ERAS protocol adopted in this study reduced the LOS and postoperative complication rate after RC at this site in Japan.

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  • Atsushi Asano, Shintaro Maru, Yutaka Toyoda, Takanori Sakuta, Kazuyuki ...
    2020 Volume 111 Issue 1 Pages 16-21
    Published: January 20, 2020
    Released on J-STAGE: January 20, 2021

    (Objectives) We examined the treatment outcomes in cases of chronic unilateral hematuria treated using flexible ureteroscope for observation and hemostasis.

    (Methods) The study included 14 patients (7 men and 7 women) with a median age of 56.5 years who underwent ureteroscopy using a digital flexible ureteroscope for chronic unilateral hematuria between March 2014 and August 2019. All the patients presented with macroscopic hematuria as a clinical symptom, but in one patient, the hematuria was accompanied by anemia and required a blood transfusion. In addition, bleeding occurred on the left side in 8 patients and on the right side in 3 patients; however, for the remaining 3 patients, the affected side could not be identified. Fourteen patients were examined on the basis of the ureteroscopic findings, number of bleeding sites, hemostatic intervention, treatment effect, and presence or absence of recurrences.

    (Results) The ureteroscopic findings showed a hemangioma in 7 patients and minute venous rupture in 3, but the remaining 4 patients showed no clear findings. The site of the findings was in the superior calyces in 8 cases, middle calyces in 4 cases, inferior calyces in 4 cases, and renal pelvic wall in 1 case. In addition, the findings were located at multiple sites in 6 cases, including all renal calyces in 2 cases. Ten patients with findings underwent hemostatic interventions (electrocoagulation and laser treatment). The median postoperative follow-up period was 32.4 months (range, 6.4-65.4 months). In all the cases, the hematuria disappeared after treatment. One of the 2 patients with findings in all renal calyces showed recurrence of macroscopic hematuria at 1 year and 6 months, which disappeared after conservative treatment.

    (Conclusions) In this study, observation using digital flexible ureteroscope was useful in the treatment of chronic unilateral hematuria, and the hemostatic interventions performed on the bleeding sites in the renal pelvis were effective.

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  • Tomoyuki Shimabukuro, Chietaka Ohmi, Koji Shiraishi, Hideyasu Matsuyam ...
    2020 Volume 111 Issue 1 Pages 22-29
    Published: January 20, 2020
    Released on J-STAGE: January 20, 2021

    (Background) Hyperuricemia is associated with hypertension, vascular disease, cardiovascular events, and renal dysfunction. Several studies have reported the relationship between serum uric acid (UA) level and clinical outcome in the general population. However, most such studies have not quantitatively evaluated the association between UA and age, body mass index (BMI), and estimated glomerular filtration rate (eGFR).

    (Method) From April 2015 to March 2016, a total 10,133 healthy individuals underwent multiphasic screening at our medical checkup center. Among all participants, eGFR was evaluated in 1,684 men and 1,195 women. The data of this cohort were reviewed and analyzed.

    (Results) The median age of men and women was 51.0 and 50.0 years, respectively. Median serum UA was 6.1 mg/dL in men and 4.5 mg/dL in women. The prevalence of hyperuricemia was 23.9% in men and 8.5% in women. In all 10-year age groups, men had significantly higher serum UAs than women. In men, no significant differences of serum UA were observed among 10-year age groups. Menopause-associated increases in serum UA among women were observed. Men in their 20s to 50s and women in their 30s to 60s showed significant differences in serum UA between each BMI category in the same age decade. Both men and women in their 40s to 60s showed significant differences in serum UA between each eGFR category in the same age decade. We used the results of multiple regression analysis to derive equations to predict the associations among these variables, as follows: men, UA (mg/dL) = 5.637+0.065 × (BMI) − 0.014 × (eGFR) (R2 = 0.059, P < 0.0001); women < 50 years old, UA (mg/dL) = 4.068+0.065 × (BMI) − 0.014 × (eGFR) (R2 = 0.091, P < 0.0001) and women > 50 years old, UA (mg/dL) = 4.311+0.075 × (BMI) − 0.017 × (eGFR) (R2 = 0.116, P < 0.0001).

    (Conclusions) We present epidemiological evidence indicating that the levels of serum UA vary with BMI and eGFR in both sexes. In women, it should be recognized that menopause is independently associated with higher levels of UA.

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Case Reports
  • Soichi Matsumura, Akira Nagahara, Shinichiro Fukuhara, Kazutoshi Fujit ...
    2020 Volume 111 Issue 1 Pages 30-33
    Published: January 20, 2020
    Released on J-STAGE: January 20, 2021

    A 32-year-old Japanese man was referred to our hospital with a chief complaint of the delayed puberty with having been aware of it since he was in his teens. Physical examination demonstrated the small penis, the impalpable left testis, and the atrophic right testis in the scrotum. Abdominal magnetic resonance imaging showed the left testis of 8 mm in the external inguinal ring. Endocrinological blood tests revealed that testosterone and luteinizing hormone were 0.34 ng/mL and 1 mIU/mL, respectively, leading to a diagnosis of the left cryptorchidism with hypogonadotropic hypogonadism. The hCG therapy was initiated, resulting in the increased volume and spontaneous descent into the scrotum of the left testis after 6 months of the treatment. The hCG therapy could be an alternative treatment for surgery for cryptorchidism with hypogonadism in adults.

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  • Hideto Ueki, Kenta Sumii, Masato Okuno, Isao Taguchi, Sawami Kiyonaka, ...
    2020 Volume 111 Issue 1 Pages 34-37
    Published: January 20, 2020
    Released on J-STAGE: January 20, 2021

    When resecting small tumors or tumors with an irregular margin, a marking technique is conducted prior to the surgery. CT-guided marking techniques are common in pulmonary surgery, but it is rarely used in abdominal or urological surgery. We performed a marking technique for a small tumor that was undetectable by ultrasound using CT guidance prior to laparoscopic resection.

    A 63 year-old woman, two years after total hysterectomy for uterine stromal sarcoma, underwent combined right kidney resection and retroperitoneal tumor resection for a giant recurrence. Two months after the surgery, micro recurrence was observed in the vicinity of the right intestinal psoas muscle which upon follow up, the tumor size increased to 1 cm. Surgical resection of the small recurrent tumor was planned. Since it was difficult to detect by ultrasound, preoperative CT-guided marking was performed. Retroperitoneal laparoscopic resection was performed the following day. The histopathological diagnosis was endometrial stromal sarcoma.

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