S Nagamori

University of California, Los Angeles, Los Angeles, CA, United States

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Publications (38)39.23 Total impact

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    ABSTRACT: Objective: To determine the appropriate template of regional lymph node dissection (LND) at the time of laparoscopic nephroureterectomy (LNU) for patients with clinically node- negative urothelial carcinoma of the upper urinary tract. Patients and Methods: This prospective study included 45 patients undergoing LND with LNU in accordance with our prospective rules regarding the area of LND. Perioperative, pathological, and follow-up data were collected. Micrometastasis in lymph nodes (LNs) was later evaluated by immunohistochemistry (IHC). Recurrence-free survival (RFS) was calculated with the Kaplan-Meier method. Results: The median number of LNs removed was 14 (range: 1-33). One patient with pT3 disease had node metastasis based on routine pathological examination, and IHC revealed micrometastases in two additional patients (pT2 in 1 and pT3 in 1). Therefore, 15% (3/20) of patients with >pT2 disease had node disease. After surgery, 6 patients experienced minor complications (Grade 1 or 2), and one elderly male patient developed Grade 5 gastrointestinal bleeding after aspiration pneumonia on the 45th postoperative day, which was not considered to be associated with LND. At the last follow-up, 4 patients (pT1 in 1, pT2 in 1, and pT3 in 2) developed lung metastasis, and one patient with a lower ureteral tumor (pT2) developed presacral lymph node metastasis, which was not included in our prospective template for a lower ureteral tumor. LN recurrence within/ near the LND area was not observed in patients with pelvic/ upper ureteral carcinoma. The 2-year non-urothelial RFS rate was 84%. Conclusions: We consider that the present template represents regional LNs for patients with clinically node-negative pelvic/ upper ureteral carcinoma, while presacral LNs may be incorporated into the regional LND template for patients with clinically node-negative lower ureteral carcinoma.
    Journal of endourology / Endourological Society 09/2014; · 1.75 Impact Factor
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    ABSTRACT: Lymphoepithelioma-like carcinoma (LELC), best known to occur in the nasopharynx, can arise in a variety of sites, such as the salivary gland, thymus, lung, stomach, skin and uroepithelium. Primary LELC of the uroepithelium is very rare and there is only limited information in the published reports. We managed a case of a 75-year-old woman who presented with nausea and gross painless hematuria. She was treated with laparoscopic nephroureterectomy and was diagnosed with a T1N1M0 LELC of the renal pelvis. Unlike nasopharyngeal lymphoepithelioma, immunohistochemical analysis of this urinary LELC was negative for the Epstein-Barr virus. Herein we report on one more case of primary LELC of the renal pelvis and review of the published reports, particularly those concerning Epstein-Barr virus expressions. Recognition of this tumor and complete resection are essential for saving patients.
    International Journal of Urology 10/2007; 14(9):851-3. · 1.73 Impact Factor
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    ABSTRACT: The aim of the present phase II study was to evaluate the efficacy of combination chemotherapy of paclitaxel, ifosfamide, and nedaplatin (PIN regimen) in patients with recurrent urothelial cancer who had been treated with cisplatin-based chemotherapy. Eligible patients were those with histologically confirmed urothelial cancer who had progressed or relapsed after cisplatin-based chemotherapy. The PIN regimen consisted of paclitaxel 175 mg/m(2) on day 1; ifosfamide 4.5 g/m2 divided over days 1, 2, and 3; and nedaplatin 70 mg/m(2) on day 1; PIN was given every 28 days. Among the 32 patients enrolled in the study (median age, 66 years), complete and partial responses were obtained in 5 patients and 19 patients, respectively, with an overall response rate of 75% (95% confidence interval [CI], 59-91%). The median time to progression was 8 months (range, 0-50+ months) and the median survival was 22 months (range, 4-52+ months). The 1- and 2-year overall survival rates were 53.7 and 42.9%, respectively. All patients experienced Grade 3 or 4 neutropenia, while Grade 3 or 4 thrombocytopenia was seen in 8 patients; Grade 3 or 4 anemia was seen in 6 patients; Grade 3 neuropathy was observed in 1 patient, for whom the PIN therapy was discontinued. There were no treatment-related deaths. The PIN combination was highly active and tolerable in previously treated patients with urothelial cancer as a second-line treatment.
    Cancer Chemotherapy and Pharmacology 10/2006; 58(3):402-7. · 2.80 Impact Factor
  • European Urology Supplements - EUR UROL SUPPL. 01/2006; 5(2):291-291.
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    ABSTRACT: A 29-year-old male patient presented with a history of painless enlargement of the left hemiscrotum. Laboratory tests for beta-human chorionic gonadotrophin, alpha-fetoprotein, and lactate dehydrogenase, physical examination, and CT of the chest, abdomen and pelvis. Histologic examination, nerve-sparing retroperitoneal lymph-node dissection. Paratesticular rhabdomyosarcoma with lymph node metastasis. Inguinal radical orchiectomy and adjuvant chemotherapy for 48 weeks. Radiotherapy and additional chemotherapy were administered following local recurrence.
    Nature Clinical Practice Urology 09/2005; 2(8):398-402; quiz 403. · 4.07 Impact Factor
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    ABSTRACT: The authors performed extensive transperineal ultrasound-guided template prostate biopsies to investigate carcinoma core distribution. Between August 2000 and May 2004, 371 men underwent template biopsies. Three hundred twelve patients had not undergone a previous biopsy (first group) and 59 had undergone previous transrectal sextant biopsies (repeat group). Of the 312 patients in the first group, 236 had normal digital rectal examination (DRE) findings (DRE- first group) and 76 patients had an abnormal DRE (DRE+ first group). A mean of 20.1 biopsy cores (range, 9-38 cores) was taken from the entire prostate. The region > 2.0 cm from the rectal face of the prostate was defined as the anterior region and the remaining area was defined as the posterior region. In the DRE- first group, the carcinoma core rate (number of tumor cores/number of biopsy cores) in the anterior region (7.2%) did not differ from that of the posterior region (7.3%) (P = 0.9635). However, in the DRE+ first group, the carcinoma core rate in the posterior region (22.0%) was found to be higher than in the anterior region (13.2%) (P < 0.0001). In the repeat group, the carcinoma core rate in the posterior region (3.1%) was significantly (P = 0.0008) lower than that exhibited in the anterior region (7.2%). The results of the current study suggest that nonpalpable prostate carcinoma is distributed equally within the entire prostate, although palpable carcinoma is distributed mainly in the posterior region and many of the tumor foci in the anterior region may be missed by a transrectal sextant biopsy. The examination of radical prostatectomy specimens is required to prove these results.
    Cancer 05/2005; 103(9):1826-32. · 5.20 Impact Factor
  • European Urology Supplements - EUR UROL SUPPL. 01/2005; 4(3):139-139.
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    ABSTRACT: A 20-year-old man was referred to our hospital for investigation of left scrotal swelling. CT scan showed intrascrotal fluid collection and calcification. Surgical exploration was performed, and histopathological diagnosis was serous papillary adenocarcinoma of the tunica vaginalis. Since it was believed that the carcinoma originated from the tunica vaginalis, left radical orchiectomy and hemiscrotal resection was performed. Patient survives without recurrence for 38 months after the surgery. Müllerian-type tumors such as serous papillary adenocarcinoma occurring in male are quite rare. In the literature, only 2 cases of serous papillary adenocarcinoma of the tunica vaginalis have been reported; ours is the 3rd case.
    Nippon Hinyōkika Gakkai zasshi. The japanese journal of urology 04/2004; 95(3):626-9.
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    ABSTRACT: We performed extensive transperineal ultrasound guided template prostate biopsy and evaluated cancer core distribution. From August 2000 to May 2002, 113 men with prostate specific antigen levels between 4.0 and 10.0 ng/ml underwent template biopsy. Eighty-six had no previous biopsy (first group) and 27 had previous transrectal sextant biopsies (repeat group). A mean of 18.4 biopsy cores were taken. We defined the region over 2 cm from the rectal face of the prostate as the anterior region and the other as the posterior. Cancer was detected in 49 of 113 (43%) men. Forty-two were in the first group and seven in the repeat group. In the first group, the cancer core rate (cancer core number/biopsy core number) in the anterior region (7.0%) had no difference from that in the posterior region (8.6%) (P = 0.7111). But in the repeat group, the cancer core rate in the anterior region (4.6%) was higher than in the posterior (1.5%) (P < 0.0001). These results suggest that transrectal sextant biopsies miss more cancers in the anterior region than in the posterior. We believe template technique has an advantage to be able to detect cancer equally in the anterior and posterior.
    The Prostate 02/2004; 58(1):76-81. · 3.84 Impact Factor
  • European Urology Supplements - EUR UROL SUPPL. 01/2004; 3(2):53-53.
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    ABSTRACT: BACKGROUND The effectiveness of a chemotherapy regimen including 5-fluorouracil (5-FU) and recombinant interferon-α-2a (rIFN-α-2a) was evaluated in hormone-refractory prostate cancer patients.METHODS Patients received a continuous intravenous infusion of 5-FU at 600 mg/m2/day for 5 days (D1–D5), followed by a bolus injection of 5-FU on D15 and D22. Patients received intramuscular injection of rIFN-α-2a at 3 million IU on D1, D3, D5, D15, and D22. This schedule was repeated every 4 weeks.RESULTSBetween 1993 and 1995, 23 patients with hormone refractory prostate cancer were enrolled in this study. Two of five patients with nodal disease exhibited partial responses according to the NPCP criteria. Fourteen of 17 patients with bone disease showed stable disease. Of 21 patients assessible for response, 9 patients had a decrease in the PSA level greater than 50% of baseline. Bone pain disappeared partially or completely in 8 of 14 patients with this symptom at entry. The median overall survival was 18 months. The associate toxicity was well tolerable.CONCLUSIONS Combination chemotherapy of 5-FU and low dose rIFN-α-2a in patients with hormone-refractory prostate cancer proved feasible, and with acceptable toxicity. Prostate 35:56–62, 1998. © 1998 Wiley-Liss, Inc.
    The Prostate 12/1998; 35(1):56 - 62. · 3.84 Impact Factor
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    ABSTRACT: We reviewed treatment results in patients with metastatic nonseminomatous germ cell tumors of the testis and examined the significance of the International Consensus Prognostic Classification to make appropriate risk-based decisions concerning induction chemotherapy. We divided 37 patients treated with platinum-based combination chemotherapy into good, intermediate, and poor prognostic groups utilizing the International Consensus Prognostic Classification. The data was analyzed for both overall survival and progression-free survival among the 3 prognostic groups. Among the 37 patients, 10 died (8 of progressive disease, 1 of pneumonia during induction chemotherapy and 1 of cyclophosphamide-induced hemorrhagic cardiomyolitis during salvage chemotherapy). The survivors were followed for 6 to 1 84 months from the beginning of induction chemotherapy (median, 80 months). Five of the 37 patients (14%) were classified as having a good prognosis, 1 8 (48%) as intermediate, and 14 (38%) as having a poor prognosis. The patients in the poor prognostic group had a 5-year overall survival of only 40%, while those in the good and intermediate groups had 5-year overall survivals of 100% and 94%, respectively. When we applied the International Consensus Prognostic Classification to patients with advanced disease classified by the Indiana University Staging System, these patients could be clearly divided into good-risk and poor-risk groups. The International Consensus Prognostic Classification is easily applicable and accurate for risk assessment in patients with metastatic nonseminomatous germ cell tumors of the testis. This classification will now be widely used in general oncology practices and for clinical trials in these patients.
    International Journal of Urology 12/1998; 5(6):562-7. · 1.73 Impact Factor
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    ABSTRACT: The effectiveness of a chemotherapy regimen including 5-fluorouracil (5-FU) and recombinant interferon-alpha-2a (rIFN-alpha-2a) was evaluated in hormone-refractory prostate cancer patients. Patients received a continuous intravenous infusion of 5-FU at 600 mg/m2/day for 5 days (D1-D5), followed by a bolus injection of 5-FU on D15 and D22. Patients received intramuscular injection of rIFN-alpha-2a at 3 million IU on D1, D3, D5, D15, and D22. This schedule was repeated every 4 weeks. Between 1993 and 1995, 23 patients with hormone refractory prostate cancer were enrolled in this study. Two of five patients with nodal disease exhibited partial responses according to the NPCP criteria. Fourteen of 17 patients with bone disease showed stable disease. Of 21 patients assessible for response, 9 patients had a decrease in the PSA level greater than 50% of baseline. Bone pain disappeared partially or completely in 8 of 14 patients with this symptom at entry. The median overall survival was 18 months. The associate toxicity was well tolerable. Combination chemotherapy of 5-FU and low dose rIFN-alpha-2a in patients with hormone-refractory prostate cancer proved feasible, and with acceptable toxicity.
    The Prostate 04/1998; 35(1):56-62. · 3.84 Impact Factor
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    ABSTRACT: A prospective randomized study on the administration of recombinant granulocyte colony stimulating factor (rG-CSF) was conducted on 15 patients with testicular germ cell tumors. The clinical stagings of all patients except one were minimal to moderate extent according to the Indiana University staging system. Combination chemotherapy using bleomycin, etoposide and cisplatinum (BEP) was performed as the initial treatment on the eligible patients. rG-CSF was administered by two different methods; 1) routine administration on the 6th day after BEP chemotherapy (group A), and 2) the same method, but after granulocytopenia of 1,500/mm3 had developed (group B). The administration of rG-CSF in group A significantly reduced the severity of leucocytopenia and also the incidence of stomatitis compared with group B. Although rG-CSF produced no significant side effects, the thrombocytopenia was prominent in the group A patients (not significant). BEP chemotherapy itself is an easily-tolerable and well established method for treating young adult patients. The method used in group B seems to be suitable in situations where thrombocytopenia and cost effectiveness.
    Hinyokika kiyo. Acta urologica Japonica 10/1996; 42(9):699-704.
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    ABSTRACT: Renal cell carcinomas (RCCs) develop in 8-63% of von Hippel-Lindau disease (VHL) patients, and loss of 3p segments, chromosome aberrations found in 90% of sporadic RCCs, has also been observed in RCCs associated with VHL. In fact, comparative analysis showed that the chromosome aberrations in RCCs associated with VHL are similar to those found in sporadic RCCs. VHL patients have the whole spectrum of tumors from small early lesions to large ones in the same kidney, providing a unique opportunity to analyze tumors in different stages of development. Subsequently deoxyribonucleic acid (DNA) content in RCCs of VHL patients was examined and correlated to their tumor size to gain some insight in the progression of sporadic RCCs. From 1988 to 1991, we have experienced 6 cases of RCCs associated with VHL who underwent partial or radical nephrectomy. A total number of 52 paraffin-embedded samples from 33 RCCs from 6 patients with VHL was analyzed by flow cytometry. The sizes of tumors ranged from 0.2 to 8.2 cm. DNA aneuploid patterns demonstrated in none of 9 tumors less than 1.6 cm, 4 of 14 tumors (29%) as large as 1.6 to 2.5 cm, and 5 of 10 tumors (50%) larger than 2.5 cm (p < 0.05). Twelve tumors less than 1.8 cm showed DNA diploid, so the smallest size of aneuploid tumors was 1.8 cm. These data suggest that DNA ploidy change (diploid to aneuploid) in RCCs probably takes place as tumors grow approximately 1.8 cm in size.
    Nippon Hinyōkika Gakkai zasshi. The japanese journal of urology 05/1996; 87(4):754-9.
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    ABSTRACT: The prognosis of patients with testis cancer classified as being in the advanced extent according to the Indiana University staging system is still poor even when treated with cisplatin based chemotherapy. Attempting to increase the efficacy of chemotherapy in this high risk group, we have adopted PVeBV chemotherapy (high dose CDDP+VBL+VP-16+BLM) for recent 8 patients with such advanced conditions. In this study, we analized the treatment outcome of those patients retrospectively. Two patients died during the first course of PVeBV chemotherapy due to cancer progression, while 6 patients treated with 3 to 4 cycles of PVeBv were eligible and assessable for response, survival, and toxicity. Five of those 6 achieved pathological CR (pCR) following surgical resection of residual masses after 3 cycles of PVeBV. The other case was saved by salvage chemotherapy with autologous BMT. All 6 patients were long-term disease free survivors in median follow up of 46 months. With the rG-CSF application and vigorous hydration, acute phase toxic effects (myelosuppression, pulmonary fibrosis and nephrotoxicity) were manageable in this intensive regimen. Long term toxic effects such as peripheral neuropathy and ototoxicity were also tolerable and quality of life in such advanced cancer patients was preserved well. To improve a cure rate of high risk testis cancer, the dose escalation of induction chemotherapy should be considered.
    Nippon Hinyōkika Gakkai zasshi. The japanese journal of urology 02/1996; 87(1):35-41.
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    ABSTRACT: We evaluated the technical feasibility and followup outcomes of a nephron sparing operation for localized renal cell carcinoma and von Hippel-Lindau disease. Our 5 patients underwent initial nephron sparing surgery followed by serial computerized tomography. All but 1 renal lesion was resected in 9 initial nephron sparing operations. Postoperative computerized tomography revealed 35 lesions of which 8 had enlarged. Four patients underwent secondary renal surgery and adequate renal function was preserved. Even with the high risk of local recurrence nephron sparing surgery is an appropriate approach for these patients.
    The Journal of Urology 01/1996; 154(6):2016-9. · 3.75 Impact Factor
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    ABSTRACT: We conducted a multicentric randomized trial to compare bilateral orchiectomy versus bilateral orchiectomy plus etoposide or estramustine phosphate as first-line therapy for advanced prostatic cancer (stage D2). From January 1991 to December 1992 a total of 46 newly diagnosed cases (registered cases) of advanced (stage D2) prostatic cancer was randomized into 3 groups as follows; Group A: bilateral orchiectomy and 25 mg/day of etoposide every 2 weeks for 6 months. Group B: bilateral orchiectomy and 560 mg/day of estramustine phosphate for 6 months. Group C: bilateral orchiectomy alone. One of group A and one of group B were ineligible cases, so 44 were eligible. In the eligible cases, ages were ranged from 54 to 90 (mean of 71.2) years old. No significant difference of patients' characteristics was found among 3 groups and median follow-up period was 25 months. Response was evaluated based on the response criteria according to Japanese urological association. Specifically, a central pathologist who blinded to the treatment was employed for evaluating pathological response at six months. Of the 44 eligible patients, 33 and 25 were evaluated for clinically and pathological analyses, respectively. Clinical response rates were 80% (12/15) of group A, 100% (4/4) of group B and 78.6% (11/14) of group C. No significant difference in the clinical response and survival rate was shown among the three groups. Significantly higher frequencies of side effects were noted in the grop B compared to the other two groups (p < 0.05) and cardiovascular complications were the most frequent in group B. Favorable pathological response was obtained in all of group B, but not statistically significant compared with 7/21 (33.3%) of response rate in group A and C. The pathological response was significantly correlated with the clinical one in all patients (p < 0.01). While 8 of 11 patients (73%) with pathological response grade 1, 2 and 3 achieved clinical PR (partial response) or CR (complete response), only 5 of 14 (36%) with grade 0 received PR or CR. We conclude that low dose administration of etoposide or estramustine phosphate dose not improve clinical response and survival in a short term in castrated patients, but increases the adverse effects due to the drugs in these patients. In addition, the pathological evaluation at 6 months after treatment appears to reflect the clinical response at that time in newly diagnosed patients with advanced prostatic cancer.
    Nippon Hinyōkika Gakkai zasshi. The japanese journal of urology 10/1995; 86(10):1530-7.
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    ABSTRACT: To evaluate the clinical relevance between the DNA ploidy and histopathology, and the incidence of the DNA heterogeneity in patients with bladder cancers. Flow cytometry (FCM) was used to study the DNA ploidy in 63 patients who underwent total cystectomy. The DNA ploidy and DNA index were analyzed by FCM in total 328 paraffin embedded samples (5.2 samples per case on the average). The DNA ploidy of 52 bladder cancers, that had coexisted after total cystectomy, showed that 24 cases, 46% were DNA aneuploid and 18 cases, 35% had DNA heterogeneity. The DNA ploidy of 11 cases that were eradicated after cystectomy was all DNA diploid. There were significantly good correlation among DNA ploidy pattern and intravesical involvement (lymph duct involvement and venous involvement), but were not among the DNA ploidy pattern and tumor grade and stage. With regard to the evaluation of two vertical divided samples of tumors, DNA aneuploid had been not always recognized in the deeper sample, therefore, we did not determine that there was good correlation between the DNA ploidy and the tumor invasion. These data suggest that although the incidence of DNA heterogeneity in bladder cancers (35%) is thought to be relatively small, the DNA ploidy will be able to the important prognosticating factor in bladder cancers.
    Nippon Hinyōkika Gakkai zasshi. The japanese journal of urology 09/1995; 86(8):1353-9.
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    ABSTRACT: This study was designed to evaluate DNA ploidy patterns and metastatic patterns between primary tumors and metastatic lymph nodes in bladder tumor patients with lymph node metastases. Flow cytometry (FCM) was used to study the DNA ploidy. The DNA ploidy patterns in 16 lymph node metastases in relation to the degree of ploidy in the primary bladder tumor were evaluated in 63 patients who underwent total cystectomy. The primary tumor that had metastasized was G3 tumor in grade and over pT2 in stage in many cases. Thirty-nine diploid tumors had given raise to lymph node metastases in only 5 cases (13%), whereas 11 cases (46%) of aneuploid tumors had metastasized (p < 0.01). With regard to ploidy patterns between primary tumors and the corresponding lymph node metastases, four patterns were noted, namely D-->D (5 cases), D + A-->D (4), A-->A (5) and A-->D (2) (D: DNA diploid, A: DNA aneuploid). The DNA index between the primary tumors and the corresponding lymph node metastases was the same in all but 2 cases (14/16.88%). In cases with lymph node metastases, the prognosis was very poor whether or not the DNA ploidy of the primary tumors or the metastatic tumors was DNA aneuploid. These data suggest that a malignant cell on the primary tumor metastasized to the lymph node in many cases.
    Nippon Hinyōkika Gakkai zasshi. The japanese journal of urology 09/1995; 86(9):1435-9.

Publication Stats

124 Citations
39.23 Total Impact Points

Institutions

  • 2007
    • University of California, Los Angeles
      • Department of Urology
      Los Angeles, CA, United States
  • 2006
    • KKR Sapporo Medical Center
      Sapporo, Hokkaidō, Japan
  • 1998–2005
    • National Cancer Center, Japan
      Edo, Tōkyō, Japan
  • 1996–1998
    • Hokkaido University
      • Department of Urology
      Sapporo-shi, Hokkaido, Japan
    • Nikko Memorial Hospital
      Hidachi, Ibaraki, Japan
  • 1988–1998
    • Hokkaido University Hospital
      • Division of Urology
      Sapporo-shi, Hokkaido, Japan