11 results on '"Osawa, Takahiro"'
Search Results
2. The Development of the Preoperative Nomogram Predicting Major Perioperative Complications after Radical Cystectomy with Ileal Conduit or Orthotopic Neobladder
- Author
-
Yamada, Shuhei, Osawa, Takahiro, Abe, Takashige, Takada, Norikata, Matsumoto, Ryuji, Ito, Yoichi M, Kikuchi, Hiroshi, Miyajima, Naoto, Tsuchiya, Kunihiko, Maruyama, Satoru, Murai, Sachiyo, and Shinohara, Nobuo
- Subjects
Radical cystectomy ,Complications ,Bladder cancer ,494.9 ,Nomogram - Abstract
Radical cystectomy (RC) is the gold standard for managing muscle-invasive and high-risknon-muscleinvasive bladder cancer, but is accompanied by non-negligible operative risk. The aim of this study is to identify preoperative variables to predict major perioperative complications after RC and to develop a nomogram using the cohort from multiple institutions in Japan. We retrospectively reviewed 668 patients who underwent open RC with ileal conduit or neobladder at Hokkaido University hospital and 20 affiliated institutions between 1997 and 2010. Complications occurring within 90 days of surgery were graded using modified Clavien classification system. We defined modified Clavien grade 3 or more as major complications and performed univariate and multivariate logistic regression analyses. Predictive accuracy of the nomogram was evaluated with the area under the receiver operating characteristics curve (AUC). A total of 528 men and 140 women were included in this study. There were a total of 160/668 patients (24%) with major perioperative complications. A multivariate model identified gender (OR : 1. 63, p=0. 04), cardiovascular comorbidity (OR : 1.48, p=0.03) and simultaneous nephroureterectomy (OR : 2.81, p=0. 01) as independent predictors. Using these 3 variables, a nomogram was developed with the AUC of 0.58. Predictive performance of our nomogram showed only fair performance ; but at least, we identified male, cardiovascular comorbidity and simultaneous nephroureterectomy as independent predictors of perioperative major complications.
- Published
- 2019
3. Validation of the Japanese version of the Body Image Scale for bladder cancer patients.
- Author
-
Sato, Miho, Osawa, Takahiro, Abe, Takashige, Honda, Michitaka, Higuchi, Madoka, Yamada, Shuhei, Furumido, Jun, Kikuchi, Hiroshi, Matsumoto, Ryuji, Sato, Yasuyuki, Sasaki, Yoshihiro, Harabayashi, Toru, Maruyama, Satoru, Takada, Norikata, Minami, Keita, Tanaka, Hiroshi, Morita, Ken, Kashiwagi, Akira, Murai, Sachiyo, and Ito, Yoichi M.
- Subjects
- *
BODY image , *BLADDER cancer , *CANCER patients , *TEST validity , *MENTAL foramen ,TUMOR surgery - Abstract
The Body Image Scale (BIS) is a 10-item tool that measures the body images of cancer patients. This study aims to validate the Japanese version of the BIS for bladder cancer patients. A multicenter cross-sectional survey was used to identify the participants, which included Japanese bladder cancer patients. The percentage of missing responses, internal consistency, and known-group validity were evaluated. The correlations between the BIS and two HRQOL instruments (the Bladder Cancer Index and the SF-12) were assessed to determine convergent validity. Among 397 patients, 221 patients were treated by transurethral resection of bladder tumor (TURBT) endoscopically, 49 patients underwent cystectomy with neobladder, and 127 patients underwent cystectomy involving stoma. The percentage of missing responses in the BIS ranged from 8.1 to 15.6%. Cronbach's α coefficient was 0.924. Higher BIS scores indicate negative body image, and the median BIS score for patients with native bladders after TURBT (0.5) was significantly lower than those of the patients with neobladder (4.0) and stoma formation (7.0), which indicated the discriminatory ability of the BIS. Each domain of the Bladder Cancer Index and the role summary score of the SF-12 correlated to the BIS scores, which confirmed the convergent validity. A range of BIS scores were identified among patients who reported similar physical summary scores and mental summary scores of the SF-12. This study confirmed the reliability and validity of the Japanese version of the BIS for bladder cancer patients. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
4. Quality improvement in managing patients with non-muscle-invasive bladder cancer by introducing a surgical checklist for transurethral resection of bladder tumor.
- Author
-
Kikuchi, Hiroshi, Osawa, Takahiro, Abe, Takashige, Matsumoto, Ryuji, Maruyama, Satoru, Murai, Sachiyo, and Shinohara, Nobuo
- Subjects
- *
CANCER invasiveness , *BLADDER cancer , *PROSTATE , *PROPORTIONAL hazards models , *LOG-rank test , *TRANSURETHRAL resection of bladder ,TUMOR surgery - Abstract
Background: The quality of transurethral resection of bladder tumor (TURBT) markedly varies among surgeons and may have a considerable impact on treatment outcomes. The importance of a surgical checklist for TURBT has been suggested in order to standardize the procedure and improve surgical and oncological outcomes. In the present study, we verified the usefulness of a checklist for managing patients with non-muscle-invasive bladder cancer (NMIBC). Methods: This retrospective study included 201 NMIBC patients diagnosed with Ta, T1, or Tis between October 2011 and February 2021. After September 2016, TURBT was performed with a checklist. We analyzed the intravesical recurrence-free survival (RFS) rate and the presence or absence of the detrusor muscle in resected specimens before and after the introduction of the checklist. Survival rates were compared using the Log-rank test. A multivariate analysis with Cox proportional hazards modeling was performed to verify risk factors for intravesical recurrence. Results: Ninety-nine patients who underwent TURBT with the checklist (checklist group) were compared with 102 patients who underwent TURBT without the checklist (non-checklist group). When the analysis was narrowed down to 9 critical items, we observed a mean number of 9 documented items per operative report (98.0% completion) after implementation of the checklist. Two-year intravesical RFS rates in the checklist and non-checklist groups were 76.7 and 69.5%, respectively (p = 0.1059). The Cox proportional multivariate analysis showed that the rate of intravesical recurrence was slightly lower in the checklist group (hazard ratio 0.7376, 95% CI 0.4064–1.3388, P = 0.3170). Conclusion: The introduction of a checklist is recommended for the standardization of TURBT and increasing the quality of operative reporting, and it may also improve oncological outcomes. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
5. Late recurrence in patients with non‐muscle‐invasive bladder cancer after 5‐year cancer‐free periods.
- Author
-
Hirata, Yurie, Higuchi, Madoka, Osawa, Takahiro, Hinotsu, Shiro, Harabayashi, Toru, Mochizuki, Tango, Enami, Nobuyasu, Nounaka, Osamu, Shinno, Yuichiro, Kikuchi, Hiroshi, Matsumoto, Ryuji, Abe, Takashige, Murai, Sachiyo, and Shinohara, Nobuo
- Subjects
BLADDER cancer ,CANCER invasiveness ,DISEASE relapse ,DISEASE risk factors ,TUMOR grading - Abstract
Objectives: There is no consensus about the follow‐up schedule after 5‐year cancer‐free periods. In this study, we aimed to elucidate the risk factors for the recurrence in patients with non‐muscle‐invasive bladder cancer who remained cancer free for more than 5 years. Methods: Data from six Japanese institutions were retrospectively reviewed. Among the patients with non‐muscle‐invasive bladder cancer who were treated with transurethral resection of bladder tumor between 1990 and 2013, those who had no recurrence for more than 5 years were included in this study. The Kaplan–Meier method and Cox hazards model were used to estimate recurrence‐free survival and to determine the pathologic and clinical factors affecting late recurrence. Results: In total, 434 patients were enrolled in this study. Of these patients, 55 patients (12.7%) experienced late recurrence. The median follow‐up time was 8.9 years (interquartile range 6.9–11.3 years). Prior history of bladder cancer before the most recent transurethral resection was a significant predictor for late recurrence (hazard ratio 1.99 [95% confidence interval 1.13–3.47], P = 0.019), although other clinical factors including tumor grade, pathologic stage, tumor multiplicity, and current risk classification systems were not associated with late recurrence. Conclusions: Late recurrence after a long tumor‐free period is not rare and it was not predicted by current risk classification systems. Only prior history of bladder cancer was a significant predictor for late recurrence in this study. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
6. Outcomes of bacillus Calmette–Guérin therapy without a maintenance schedule for high‐risk non‐muscle‐invasive bladder cancer in the second transurethral resection era.
- Author
-
Kikuchi, Hiroshi, Abe, Takashige, Matsumoto, Ryuji, Osawa, Takahiro, Maruyama, Satoru, Murai, Sachiyo, and Shinohara, Nobuo
- Subjects
BLADDER cancer ,CANCER invasiveness ,URETHRA ,PROPORTIONAL hazards models ,PROGRESSION-free survival ,TUMOR classification ,MULTIPLE tumors - Abstract
Objectives: We examined the outcomes of eight weekly bacillus Calmette–Guérin induction therapy after second transurethral resection, and investigated risk factors for intravesical recurrence or disease progression in high‐risk non‐muscle‐invasive bladder cancer patients. Methods: This retrospective study included 146 high‐risk non‐muscle‐invasive bladder cancer patients who received eight weekly bacillus Calmette–Guérin instillations without a maintenance schedule between 2000 and 2019. Intravesical recurrence‐free and progression‐free survival rates were evaluated using the Kaplan–Meier method. The Cox proportional hazards model was used to identify risk factors. Results: Pathological T staging in the first transurethral resection was pTa in 56 patients (38.4%), pT1 in 75 (51.4%) and primary carcinoma in situ in 15 (10.2%). A total of 109 (83.2%) with pTa–1 disease underwent second transurethral resection before bacillus Calmette–Guérin induction therapy, and residual disease was detected in 54 (49.5%). The completion rate of eight instillations was 82.2%. The 2‐ and 5‐year intravesical recurrence‐free survival rates were 80.7% and 75.2%, whereas the 2‐ and 5‐year progression‐free survival rates were 85.7% and 82.0%. Recurrent tumors (hazard ratio 6.5830, P = 0.0007) and residual tumors at the second transurethral resection (hazard ratio 4.0337, P = 0.0021) were risk factors for intravesical recurrence. Multiple tumors (hazard ratio 5.8056, P = 0.0302), pT1 disease (hazard ratio 3.7351, P = 0.0447) and residual tumors at second transurethral resection (hazard ratio 3.2552, P = 0.0448) were associated with disease progression. Conclusions: Accurate disease staging and disease elimination by second transurethral resection followed by eight weekly bacillus Calmette–Guérin instillations achieved good disease control. Our protocol (without a maintenance schedule) after thorough surgical resection has potential as a treatment option in the current bacillus Calmette–Guérin shortage. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
7. Cost comparison between open radical cystectomy, laparoscopic radical cystectomy, and robot-assisted radical cystectomy for patients with bladder cancer: a systematic review of segmental costs.
- Author
-
Morii, Yasuhiro, Osawa, Takahiro, Suzuki, Teppei, Shinohara, Nobuo, Harabayashi, Toru, Ishikawa, Tomoki, Tanikawa, Takumi, Yamashina, Hiroko, and Ogasawara, Katsuhiko
- Subjects
CYSTECTOMY ,META-analysis ,BLADDER cancer ,QUALITY-adjusted life years ,SURGICAL robots ,OPERATING costs - Abstract
Background: Robot-assisted radical cystectomy is becoming a common treatment for bladder carcinoma. However, in comparison with open radical cystectomy, its cost-effectiveness has not been confirmed. Although few published reviews have compared total costs between the two surgical procedures, no study has compared segmental costs and explained their impact on total costs.Methods: A systematic review was conducted based on studies on the segmental costs of open, laparoscopic, and robot-assisted radical cystectomy using PubMed, Web of Science, and Cochrane Library databases to provide insight into cost-effective management methods for radical cystectomy. The segmental costs included operating, robot-related, complication, and length of stay costs. A sensitivity analysis was conducted to determine the impact of the annual number of cases on the per-case robot-related costs.Results: We identified two studies that compared open and laparoscopic surgeries and nine that compared open and robotic surgeries. Open radical cystectomy costs were higher than those of robotic surgeries in two retrospective single-institution studies, while robot-assisted radical cystectomy costs were higher in 1 retrospective single-institution study, 1 randomized controlled trial, and 4 large database studies. Operating costs were higher for robotic surgery, and accounted for 63.1-70.5% of the total robotic surgery cost. Sensitivity analysis revealed that robot-related costs were not a large proportion of total surgery costs in institutions with a large number of cases but accounted for a large proportion of total costs in centers with a small number of cases.Conclusions: The results show that robot-assisted radical cystectomy is more expensive than open radical cystectomy. The most effective methods to decrease costs associated with robotic surgery include a decrease in operating time and an increase in the number of cases. Further research is required on the cost-effectiveness of surgeries, including quality measures such as quality of life and quality-adjusted life years. [ABSTRACT FROM AUTHOR]- Published
- 2019
- Full Text
- View/download PDF
8. Long-Term Renal Function Outcomes in Bladder Cancer After Radical Cystectomy.
- Author
-
Osawa, Takahiro, Shinohara, Nobuo, Maruyama, Satoru, Oba, Koji, Abe, Takashige, Maru, Shintaro, Takada, Norikata, Sazawa, Ataru, and Nonomura, Katsuya
- Subjects
- *
BLADDER cancer , *CYSTECTOMY , *UROLOGICAL surgery , *CREATININE , *PYELONEPHRITIS , *CANCER chemotherapy - Abstract
Purpose: To evaluate postoperative renal function and risk factors for the loss of renal function in patients who had undergone radical cystectomy. Materials and Methods: A retrospective single institutional study evaluated 70 patients, including 54 men and 16 women who underwent radical cystectomy. The median follow-up period was 34.5 months (range, 12 to 228 months). In this cohort, four types of urinary diversions were studied, including ileal neobladder (n = 24), ileocecal neobladder (n = 12), ileal conduit (n = 25), and cutaneous ureterostomy (n = 9). Postoperative changes in renal function were reviewed, and the estimated serum creatinine-based glomerular filtration rate (eGFR) was calculated. The variables analyzed were age, a prior history of hypertension or diabetes mellitus, pre-operative renal function, type of urinary diversion, the postoperative occurrence of acute pyelonephritis, and the presence of chemotherapy. Results: The mean eGFR was 74.6 (range, 15.2 to 155.1) mL/min/1.73 m² before surgery and 63.6 (range, 8.7 to 111.5) mL/min/1.73 m² at the last follow-up. The 10-year renal deterioration-free interval was 63.8%. Multivariate analysis showed that a postoperative episode of acute pyelonephritis [Odds Ratio (OR), 3.21; 95% Confidence Interval (CI), 1.14 to 9.02; P = .03] and the presence of chemotherapy (OR, 3.27; 95% CI, 1.33 to 8.01; P = .01) were significant adverse factors. Conclusion: Twenty-four (34.2%) patients demonstrated reduced renal function during the follow-up period. Postoperative episodes of acute pyelonephritis and the presence of chemotherapy were found to be significant adverse factors. [ABSTRACT FROM AUTHOR]
- Published
- 2013
9. Pathological characteristics and clinical course of bladder tumour developing after nephroureterectomy.
- Author
-
Abe, Takashige, Shinohara, Nobuo, Harabayashi, Toru, Sazawa, Ataru, Akino, Tomoshige, Ishikawa, Shuhei, Kubota, Kanako, Matsuno, Yoshihiro, Osawa, Takahiro, Shibata, Takeshi, Toyoda, Yutaka, Shinno, Yuichiro, Kamota, Shinji, Minami, Keita, Sakashita, Shigeo, Kumagai, Akira, Takada, Norikata, Togashi, Masaki, Sano, Hiroshi, and Mori, Tatsuya
- Subjects
THERAPEUTICS ,TUMORS ,URINARY organ cancer ,CANCER patients ,BLADDER cancer ,RADIOTHERAPY ,MULTIVARIATE analysis - Abstract
Study Type – Therapy (case series) Level of Evidence 4 OBJECTIVES To determine the pathological features and clinical course of intravesical recurrence after nephroureterectomy (NU) for upper urinary tract (UUT) cancer. PATIENTS AND METHODS Among 325 patients undergoing NU with bladder cuff excision for UUT cancer, in this retrospective multi-institutional study we evaluated 113 who developed bladder tumour after NU. Excluding patients with (i) perioperative systemic chemotherapy or radiotherapy for UUT cancer; (ii) a history of previous or synchronous bladder cancer at the time of NU; (iii) distant metastasis at the time of NU; (iv) a follow-up of <1 year after the initial bladder cancer recurrence; or (v) missing data, 74 patients were included in this study. We compared the pathology between UUT cancer and the first bladder cancer recurrence, using Fisher’s exact test. Further intravesical recurrence and bladder cancer progression was analysed using the Kaplan-Meier method, with the log-rank test used to assess significance. A Cox proportional hazard model was used for multivariate analysis. RESULTS The grade of the first bladder cancer recurrence strongly correlated with that of the UUT tumour ( P < 0.001) and the carcinoma in situ (CIS) lesion with the first bladder cancer recurrence correlated with high grade (grade 3) UUT tumour ( P < 0.001). In all, 56 of the assessable 70 patients further developed intravesical recurrence at a median interval of 7 months after the first bladder cancer recurrence. There were no clinicopathological factors that predicted the second recurrence. Progression occurred in 14 patients, at a median interval of 25 months. A CIS lesion with the first bladder cancer recurrence was a risk factor for progression on multivariate analysis. CONCLUSIONS A large proportion of the patients who developed bladder tumour after NU had further intravesical recurrence, which indicated its refractory nature. Especially when a CIS lesion is detected in the initial intravesical recurrence, a careful follow-up is mandatory to detect bladder cancer progression. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
10. Role of lymph node density in predicting survival of patients with lymph node metastases after radical cystectomy: A multi-institutional study.
- Author
-
Osawa, Takahiro, Abe, Takashige, Shinohara, Nobuo, Harabayashi, Toru, Sazawa, Ataru, Kubota, Kanako, Matsuno, Yoshihiro, Shibata, Takeshi, Shinno, Yuichiro, Kamota, Shinji, Minami, Keita, Sakashita, Shigeo, Kumagai, Akira, Mori, Tatsuya, and Nonomura, Katsuya
- Subjects
- *
PROGNOSIS , *LYMPH nodes , *CYSTS (Pathology) , *DRUG therapy , *UROLOGY , *SURGICAL pathology - Abstract
Objectives: To evaluate the prognostic role of different clinico-pathological parameters in node-positive patients treated by radical cystectomy. Methods: A retrospective multi-institutional study of 435 patients who underwent radical cystectomy between 1990 and 2005 was carried out. Of them, pathological lymph node (LN) metastases were found in 83 patients. Sixty of these 83 patients, whose clinical information and follow-up data were available, were included in the analysis. Twenty-five patients had undergone adjuvant chemotherapy, whereas 35 had not. A Cox proportional hazards model was used to determine the impact of the following clinico-pathological parameters on patient survival: number of resected LNs, number of positive LNs, LN density (defined as the ratio of the number of positive LNs divided by the total number of resected LNs) and adjuvant chemotherapy. Results: Median follow-up for surviving patients was 41 months (range 4–138) after surgery. The median survival time for all patients was 22 months (95% confidence interval, 15–42 months). At multivariate analysis, LN density of 25% or less, adjuvant chemotherapy and pure urothelial carcinoma were independently significant predictors of survival. Conclusions: Lymph node density predicts survival in patients with node-positive bladder cancer. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
- View/download PDF
11. Development of the Japanese version of the health‐related quality of life questionnaire for bladder cancer patients using the Bladder Cancer Index: A pilot study.
- Author
-
Osawa, Takahiro, Wei, John T, Abe, Takashige, Kako, Yuki, Murai, Sachiyo, and Shinohara, Nobuo
- Subjects
- *
ILEAL conduit surgery , *URINARY diversion , *QUALITY of life , *BLADDER cancer , *CANCER patients , *PILOT projects - Abstract
Development of the Japanese version of the health-related quality of life questionnaire for bladder cancer patients using the Bladder Cancer Index: A pilot study The BCI has been translated and validated into French, Spanish, Arabian and Hungarian languages.[4] Furthermore, the BCI was recently used to evaluate function HRQOL among patients treated for bladder cancer in a comparative study.[5] Measuring health-related quality of life outcomes in bladder cancer patients using the Bladder Cancer Index (BCI). [Extracted from the article]
- Published
- 2019
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.