The Japanese Journal of Urology
Online ISSN : 1884-7110
Print ISSN : 0021-5287
ISSN-L : 0021-5287
Volume 107 , Issue 4
Showing 1-11 articles out of 11 articles from the selected issue
Original Articles
  • Kazuto Chiba, Shuhei Kamada, Satoshi Yamamoto, Atsushi Okato, Toshihit ...
    2016 Volume 107 Issue 4 Pages 215-219
    Published: October 20, 2016
    Released: October 24, 2017
    JOURNALS FREE ACCESS

    (Objectives) To evaluate the safety and oncologic efficacy of laparoscopic radical nephrectomy (LRN) for renal cell carcinoma (RCC) >7 cm, we retrospectively reviewed the clinical outcome and long-term cancer control of patients who underwent LRN in comparison to open radical nephrectomy (ORN).

    (Patients and methods) The clinical records of 79 patients with RCC >7 cm, who underwent radical nephrectomy (37 LRN; 42 ORN) between 1993 and 2014, were reviewed.

    (Results) The 2 groups (LRN and ORN) were comparable regarding age, body mass index and mean tumor size (86.5 mm vs. 94.6 mm).

    The operative time was significantly longer in the LRN group than ORN group (204 min vs. 168 min; p<0.05) and blood loss was significantly lower in the LRN group than in the ORN group (144 ml vs. 930 ml; p<0.05).

    No statistically significant difference was found in complication rate (10.8% vs. 23.8%) and the 2-year recurrence-free survival rate (85.6% vs. 83.8%).

    (Conclusion) Despite the longer operative time, LRN for large RCC was associated with lower blood loss. This study provides evidence of the safety and efficacy of LRN for large RCC.

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  • Toru Kanno, Masashi Kubota, Kazuo Otsuka, Hiromasa Sakamoto, Ryuichi N ...
    2016 Volume 107 Issue 4 Pages 220-226
    Published: October 20, 2016
    Released: October 24, 2017
    JOURNALS FREE ACCESS

    (Objective) Although laparoscopic radical cystectomy (LRC) is becoming a standard care for invasive and high-risk non-invasive bladder cancer in Japan, the data about mid-and long-term oncological outcome is still lacking. We previously reported our initial experience of LRC compared to open radical cystectomy. In this study, we evaluated mid-term oncological outcome for LRC by updating our clinical data. In addition, we evaluated the effect of technical modifications for LRC.

    (Patients and methods) From March 2005 to September 2015, 60 patients underwent LRC at our institution. Treatment outcomes including surgical and oncological outcomes were analyzed. We also assessed the effect of technical modifications between first 30 cases and second 30 cases as to blood loss, operating time and complication rate.

    (Results) The overall complication rate was 47%, including 18% serious complications (Clavien score 3 or greater). The 5-year recurrence-free survival, cancer-specific survival, and overall survival were 56.2%, 74.4%, and 63.6%, respectively. The recurrence occurred in 19 (32%) cases, including distant metastasis in 12 (20%) cases, local recurrence in 6 (10%) cases, and both in 1 (2%) cases. As for the effect of technical modifications for LRC, the blood loss decreased and postoperative recovery was faster in second 30 cases.

    (Conclusion) These results indicate that LRC could be performed safely with acceptable oncological outcomes.

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  • Katsuya Aoki, Shunta Hori, Yosuke Morizawa, Yasushi Nakai, Makito Miya ...
    2016 Volume 107 Issue 4 Pages 227-232
    Published: October 20, 2016
    Released: October 24, 2017
    JOURNALS FREE ACCESS

    (Objectives) To compare efficacy and outcome of urethroplasty for complicated anterior urethral strictures.

    (Methods) Twelve patients, included 3 boys, with anterior urethral stricture underwent urethroplasty after the failure of either urethral dilatation or internal urethrotomy. We evaluated pre- and post-operative Q max and surgical outcome.

    (Results) Four patients were treated with end-to-end anastomosis, included a case of bulbar urethral elongation simultaneously, one patient was treated with augmented anastomotic urethroplasty, three patients were treated with onlay urethroplasty with prepucial flap, one patient was treated with tubed urethroplasty with prepucial flap (Ducket procedure) and three patients were treated with onlay urethroplasty with buccal mucosal graft. Postoperative Qmax improved in all patients without major complications and recurrence during follow-up periods ranging from 17 to 102 months (mean 55 months).

    (Conclusions) Urethroplasty is an effective therapeutic procedure for complicated anterior urethral stricture.

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  • Hideki Takeshita, Satoru Kawakami, Kojiro Tachibana, Shunsuke Hiranuma ...
    2016 Volume 107 Issue 4 Pages 233-238
    Published: October 20, 2016
    Released: October 24, 2017
    JOURNALS FREE ACCESS

    (Objectives) Testicular torsion (TT) is a socially and clinically important urological emergency condition because delayed diagnosis and treatment can lead to testicular loss. Although a possible association between TT and low ambient temperature has been argued, the clinical significance of the association has not been fully elucidated. We retrospectively collected acute scrotum cases and investigated the association between the risk of TT among acute scrotums and ambient temperatures on the day of onset.

    (Patients and methods) We studied 105 consecutive acute scrotum patients with suspected TT who underwent urgent surgical exploration between October 2004 and October 2014. The patients' age, residential area, time and date of onset, laboratory findings, and operative findings were collected from their medical records. Climate data, including daily mean ambient temperature (DMAT), diurnal temperature change (DTC), humidity, and atmospheric pressure at the time of onset, were obtained from the Japan Meteorological Agency website. The chi-square and Wilcoxon rank sum tests were used to evaluate statistical differences. Logistic regression analysis used to identify significant predictors of TT.

    (Results) The median age of the patients was 13 years (range, 1-43 years). The affected side was the right/left/bilateral side in 46/58/1 of the patients. Surgical exploration revealed TT in 67 patients. The remaining 38 non-TT patients included 12 with testicular appendage torsions, 12 with epididymal appendage torsions, 9 with epididymitis, 2 with orchitis, 2 with idiopathic hematomas, and 1 with allergic purpura. The median DMATs at the day of onset were 10.8°C (1.8-29.4°C) in the TT patients and 19.4°C (1.9-29.1°C) in the non-TT patients. The incidence of TT among the patients with acute scrotum explored surgically (TT incidence) in days with DMATs <15°C (80%) was significantly higher than that in days with DMATs ≥ 15°C (45%; p<0.001). During days with DMATs ≥15°C, the TT incidence in days with DTCs ≥10°C (62%) was significantly higher than that in days with DTCs <10°C (32%; p=0.037). Multivariate analysis revealed higher age (≥14), low serum C-reactive protein level (<0.5 ng/ml) and low DMAT (<15°C) were significant risk factor for TT in patients with acute scrotum undergoing surgery.

    (Conclusions) It should be noted that in this study, the onset of acute scrotum during days with low ambient temperatures or large DTCs was associated with a moderate to high possibility of TT.

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  • Yusuke Tominaga, Satoshi Katayama, Eiichi Ando, Tadasu Takenaka, Katsu ...
    2016 Volume 107 Issue 4 Pages 239-244
    Published: October 20, 2016
    Released: October 24, 2017
    JOURNALS FREE ACCESS

    (Objectives) This paper aimed to report the clinical statistics on urologic diseases treated in the emergency department (ED).

    (Patients and methods) We retrospectively evaluated 1,480 patients diagnosed with urologic diseases in the ED between January 2013 and December 2014. We reviewed the patients' sex, age, main complaints, emergency grade, care-seeking process, hospitalization, examination items, and diagnosis. We also reviewed the correct-diagnosis rates of patients who visited the ED for the first time and were followed up at the urology department.

    (Results) Of the patients, 2.6% were diagnosed as having a urologic disease, with a male-to-female ratio of 1.5:1. The age distribution ranged from 0 to 101 years, with a median age of 53 years. Patients who required hospitalization accounted for 17.8%. The diagnoses were urolithiasis (546 cases), cystitis (220 cases), and pyelonephritis (137 cases), in order of frequency. The correct-diagnosis rates of urolithiasis (91.2%), benign prostatic hyperplasia (75.0%), and pyelonephritis (71.9%) were high. However, those of testicular torsion (0%), urologic neoplasm (26.7%), prostatitis (35.7%), and epididymitis (35.7%) were low.

    (Conclusion) In the ED, 82.2% of cases of urologic diseases were mild and did not require hospitalization. The correct-diagnosis rate of acute scrotum was low, as it was difficult to diagnose and thus difficult to manage in the ED. Therefore, urologists should cooperate with ED staff and warn them that cases of acute scrotum should be subjected to emergency consultation.

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Case Reports
  • Masato Yasui, Yusuke Hattori, Koichi Uemura, Hiroaki Ishida, Jun-ichi ...
    2016 Volume 107 Issue 4 Pages 245-250
    Published: October 20, 2016
    Released: October 24, 2017
    JOURNALS FREE ACCESS

    (Introduction) A pheochromocytoma diagnosed during pregnancy is rare, and also its fetal and maternal mortality is high if undiagnosed. We report two cases with successful pregnancy outcome with pheochromocytoma.

    (Case 1) A 31-years-old previously healthy woman presented at 19 week period of gestation with high blood pressure. High urine catecholamine level and a left adrenal mass recognized by magnetic resonance imaging (MRI) confirmed adrenal pheochromocytoma. The patient had good blood pressure control after we started doxazosin 4 mg daily, and Caesarean section was performed at 35 week period of gestation. Two months after delivery, laparoscopic adrenalectomy was performed and she was discharged in the absence of hypertension.

    (Case 2) A 31-years-old previously healthy woman presented at 29 week period of gestation with exacerbation of headache and palpitation. High urine catecholamine level and a mass recognized close to the inferior vena cava by MRI confirmed extraadrenal pheochromocytoma. The patient had good blood pressure after we started doxazosin 4 mg daily and labetalol hydrochloride 200 mg daily. Caesarean section was performed at 35 week period of gestation. One month after delivery, laparotomic resection of the tumor was performed. Seven years later, hypertension reoccurred and there was an extraadrenal pheochromocytoma recurrence. We had a laparotomic resection for the recurrent tumor, and now she is in the absence of hypertension.

    (Conclusion) Pheochromocytoma should be considered as a differential diagnosis in a case of high blood pressure occurred during pregnancy. Early detection and appropriate treatment is crucial to reduce fetal and maternal mortality.

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  • Hirofumi Kurose, Kosuke Ueda, Rei Oonishi, Naoyuki Ogasawara, Katsuaki ...
    2016 Volume 107 Issue 4 Pages 251-255
    Published: October 20, 2016
    Released: October 24, 2017
    JOURNALS FREE ACCESS

    Metanephric adenoma is an extremely rare benign tumor. We report two cases of metanephric adenoma that were diagnosed preoperatively as renal cell carcinoma (RCC).

    Case 1 was a right renal tumor found by ultrasonography in a 57-year old woman who presented for a medical examination. Abdominal CT revealed a 26-mm mass that was enhanced weakly in the early phase and enhanced strongly in the late phase, in the right kidney. Based on a clinical diagnosis of RCC (cT1aN0M0), laparoscopic partial nephrectomy was performed. Case 2 was a left renal tumor incidentally found during an annual examination of a 79-year old woman with a past history of breast cancer. Abdominal CT revealed a 24-mm mass that was enhanced heterogeneously in the left kidney. Based on a clinical diagnosis of RCC (cT1aN0M0), laparoscopic radical nephrectomy was performed. The pathological diagnosis of both cases was metanephric adenoma.

    It is often difficult to distinguish metanephric adenoma from other malignant neoplasms preoperatively. When it is difficult to distinguish between renal cell carcinoma and metanephric adenoma, renal tumor biopsy and minimal surgery is required.

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  • Mariko Tabata, Shinji Urakami, Shintaro Takahashi, Kazushige Sakaguchi ...
    2016 Volume 107 Issue 4 Pages 256-260
    Published: October 20, 2016
    Released: October 24, 2017
    JOURNALS FREE ACCESS

    We report a patient with retroperitoneal myxoid liposarcoma recurrence who achieved remarkable improvements in performance status (PS) and maintained stable disease for approximately 5 months when treated with combination chemotherapy with gemcitabine (GEM) and docetaxel combination chemotherapy (GD). A 51-year-old woman was referred to our hospital with the chief complaint of a palpable mass in the left side of the abdomen. A retroperitoneal liposarcoma was diagnosed on the basis of magnetic resonance imaging and computed tomography results, and tumor resection was performed. The histopathological evaluation showed myxoid liposarcoma, which was classified as grade 2 according to the French Federation of Cancer Centers Sarcoma Group (FNCLCC) system.

    Two months later, the tumor regionally recurred as peritoneal dissemination with rapid growth. Five months after the surgery, the growing tumor caused appetite loss and pleural effusion in the left lung. GD was administered (800 mg/m2 GEM on days 1 and 8, and 60 mg/m2 docetaxel on day 8) and 4 cycles were administered.

    The resulting decrease in abdominal girth and in the amount of pleural effusion allowed the patient to regain her appetite, and the patient's PS greatly improved from 3 to 1.

    Initially, GD was shown to be effective for the treatment of leiomyosarcoma and pleomorphic sarcoma, and it is now recommended as one of the first-line regimens in the National Comprehensive Cancer Network guidelines for soft tissue sarcoma treatment. The patient in this case showed remarkable improvement in PS after tumor recurrence and maintained stable disease for some time, without severe adverse effects.

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  • Yasuhiro Hakamata, Yuka Kanda, Kota Sugiura, Shin Imai, Tatsuaki Yoned ...
    2016 Volume 107 Issue 4 Pages 261-265
    Published: October 20, 2016
    Released: October 24, 2017
    JOURNALS FREE ACCESS

    We report a case of pancreatic metastasis from prostate cancer. A 65 year-old man developed gross hematuria, and was found to have a markedly elevated PSA and abnormal CT findings indicating mass lesions in bilateral lungs, and pancreatic head, and osteoblastic lesions in pelvic bone. He was referred to the department of Urology and Gastroenterology at Seirei Hamamatsu General Hospital. Digital rectal examination revealed a hen's egg-sized, stony-hard prostate. A systematic needle biopsy of the prostate demonstrated adenocarcinoma (Gleason score 4+4=8). We diagnosed multiple lung and bone metastases from prostate cancer, and suspected that a primary pancreatic ductal carcinoma. The patient was started on an androgen deprivation therapy (ADT) with bicalutamide and degarelix. After 4 months from the initiation of ADT, an MRI of the pancreas showed decreased size of the pancreatic head mass from 18 mm to 7 mm in diameter. We concluded that the pancreatic head mass was metastasis from prostate cancer, and currently continue ADT. Pancreatic metastasis from prostate cancer is very rare, and further accumulation of cases will be required.

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  • Keiichiro Mori, Takahiro Kimura, Hidenori Suzuki, Hirokazu Goto, Shoic ...
    2016 Volume 107 Issue 4 Pages 266-270
    Published: October 20, 2016
    Released: October 24, 2017
    JOURNALS FREE ACCESS

    Carcinosarcoma of the prostate is a rare but aggressive tumor characterized by combination of malignant epithelial and mesenchymal cells. We encountered a case of carcinosarcoma of the prostate. A 78-year-old man with urinary retention was diagnosed with benign prostatic hyperplasia on the basis of the ultrasonography and rectal examination findings, negative result of prostate biopsy. Transurethral resection of the prostate was performed, and the pathological diagnosis was carcinosarcoma of the prostate with squamous cell carcinoma. The patient died of disease 5 months after the diagnosis of carcinosarcoma. A total of 17 cases of carcinosarcoma of the prostate including the present case, have been reported in the Japanese literature to date. Herein we review the 17 cases and discuss the clinical features.

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  • Masato Baba, Keiji Tomita, Tetsuya Yoshida, Susumu Kageyama, Kazuyoshi ...
    2016 Volume 107 Issue 4 Pages 271-275
    Published: October 20, 2016
    Released: October 24, 2017
    JOURNALS FREE ACCESS

    A 25-year-old man presented complaining of a painful, left scrotal swelling. He first noticed a mass in his left scrotum during childhood, but, in the absence of clinical symptoms, did not seek medical attention. We detected a left testicular tumor which was elastic, firm and smooth. Serum levels of alpha-fetoprotein (AFP), human chorionic gonadotropin (hCG), and lactate dehydrogenase (LDH) were all within normal range. Magnetic resonance imaging (MRI) and ultrasound revealed a solid tumor with cysts accompanied by intracystic hemorrhage and calcified walls. From the above findings, the tumor was suspected to be benign and, we therefore planned testis-sparing surgery. We performed tumor enucleation under cold ischemia. Since an intraoperative frozen section revealed the tumor to be benign, we preserved the remaining testis as planned. The final pathologic diagnosis was a mature teratoma without a malignant germ cell component. Evidence of recurrence has not been observed five years after the operation. In conclusion, when a mature teratoma that has been present since prepuberty is suspected in an adult, testis-sparing surgery should be considered.

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