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Higashihara E, Nutahara K, Itoh M, Okegawa T, Tambo M, Yamaguchi T, Nakamura Y, Taguchi S, Kaname S, Yokoyama K, Yoshioka T, Fukuhara H. Long-Term Outcomes of Longitudinal Efficacy Study With Tolvaptan in ADPKD. Kidney Int Rep 2022; 7:270-281. [PMID: 35155866 PMCID: PMC8820994 DOI: 10.1016/j.ekir.2021.11.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 11/24/2021] [Accepted: 11/29/2021] [Indexed: 11/17/2022] Open
Abstract
Introduction The effects of long-term and uninterrupted tolvaptan treatment on autosomal dominant polycystic kidney disease (ADPKD) are unclear. Therefore, a more than 3-year continuous treatment study was performed. Methods From the Kyorin University cohort, 299 patients were surveyed and 179 patients were indicated for tolvaptan having a total kidney volume (TKV) ≥750 ml, TKV slope ≥5%/yr, and estimated glomerular filtration rate (eGFR) ≥15 ml/min per 1.73 m2. Among 179 patients, 118 patients consented to the study. Results Retrospective pretreatment and prospective on-treatment periods had a median of 1.8 and 4.0 years, respectively. During the 5 treatment-years, the log10(TKV) slope/yr decreased from the pretreatment period (P < 0.0001) and the estimated height-adjusted TKV growth rate α (eHTKV-α, %/yr) decreased from baseline (P < 0.0001). The decline in eGFR improved in female patients (P < 0.0001), but not in males (P = 0.6321). Furthermore, during the 5 treatment-years, eGFR remained significantly better in the group with a percent decrease in eHTKV-α from baseline to the first treatment-year ≥ the median (2.94%) than in the group with a decrease <2.94%. The free-water clearance was higher in males than in females irrespective of treatment. Conclusion The TKV growth rate decreased in 4 years with tolvaptan in both sexes. The insignificant effects of tolvaptan on the eGFR slope in males were likely due to androgen stimulation of cystogenesis and analytical difficulty of longitudinal changes in nonlinear trajectories of eGFR. The larger decrease in eHTKV-α in the first year was related to a better renal prognosis. The vasopressin-mediated water reabsorption was activated more in females than males irrespective of tolvaptan administration.
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Oshina T, Taguchi S, Miyakawa J, Akiyama Y, Sato Y, Kawai T, Fukuhara H, Nakagawa T, Kume H. Clinicopathological features and oncological outcomes of urothelial carcinoma involving the ureterovesical junction. Jpn J Clin Oncol 2022; 52:65-72. [PMID: 34510192 DOI: 10.1093/jjco/hyab143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Accepted: 08/26/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The ureterovesical junction is the boundary between the urinary bladder and upper urinary tract. Because treatment strategies for bladder cancer and upper tract urothelial carcinoma are entirely different, urothelial carcinoma involving the ureterovesical junction requires special attention. Nevertheless, studies focusing on the disease are lacking. METHODS We reviewed consecutive patients with urothelial carcinoma treated via either transurethral resection of bladder tumor (n = 2791) or radical nephroureterectomy (n = 292) between 2000 and 2020 and identified those with bladder cancer involving the ureteral orifice (n = 64) and those with upper tract urothelial carcinoma involving the intramural ureter (≤2 cm) (n = 41). After excluding overlapping cases (n = 24), 80 patients with urothelial carcinoma involving the ureterovesical junction were analyzed. RESULTS The initial symptoms or reasons for diagnosing urothelial carcinoma involving the ureterovesical junction were hematuria (n = 30), hydronephrosis (n = 21), follow-up examinations for prior urothelial carcinoma (n = 13), screening examinations (n = 7), frequent urination (n = 6) and unknown causes (n = 3). During a median follow-up period of 42 months, 18 patients died of urothelial carcinoma. The definitive surgical treatments for urothelial carcinoma involving the ureterovesical junction were transurethral resection of bladder tumor alone (n = 26), radical nephroureterectomy (n = 41) and radical cystectomy (n = 13), with different treatments having different cancer-specific survivals. Multivariate analyses identified T stage (≥T2) as an independent predictor of shorter cancer-specific survival. CONCLUSIONS Given the positional property of urothelial carcinoma involving the ureterovesical junction, the profiles of patients with the disease were highly heterogeneous. Further optimization of treatment strategies for urothelial carcinoma involving the ureterovesical junction is urgently warranted for better clinical outcomes.
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Watanabe M, Taguchi S, Machida H, Tambo M, Takeshita Y, Kariyasu T, Fukushima K, Shimizu Y, Okegawa T, Fukuhara H, Yokoyama K. Clinical validity of non-contrast-enhanced VI-RADS: prospective study using 3-T MRI with high-gradient magnetic field. Eur Radiol 2022; 32:7513-7521. [PMID: 35554648 PMCID: PMC9668777 DOI: 10.1007/s00330-022-08813-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 03/27/2022] [Accepted: 04/12/2022] [Indexed: 01/03/2023]
Abstract
OBJECTIVES To develop a modified Vesical Imaging Reporting and Data System (VI-RADS) without dynamic contrast-enhanced imaging (DCEI), termed "non-contrast-enhanced VI-RADS (NCE-VI-RADS)", and to assess the additive impact of denoising deep learning reconstruction (dDLR) on NCE-VI-RADS. METHODS From January 2019 through December 2020, 163 participants who underwent high-gradient 3-T MRI of the bladder were prospectively enrolled. In total, 108 participants with pathologically confirmed bladder cancer by transurethral resection were analyzed. Tumors were evaluated based on VI-RADS (scores 1-5) by two readers independently: an experienced radiologist (reader 1) and a senior radiology resident (reader 2). Conventional VI-RADS assessment included all three imaging types (T2-weighted imaging [T2WI], diffusion-weighted imaging [DWI], and dynamic contrast-enhanced imaging [DCEI]). Also evaluated were NCE-VI-RADS comprising only non-contrast-enhanced imaging types (T2WI and DWI), and "NCE-VI-RADS with dDLR" comprising T2WI processed with dDLR and DWI. All systems were assessed using receiver-operating characteristic curve analysis and simple and/or weighted κ statistics. RESULTS Muscle invasion was identified in 23/108 participants (21%). Area under the curve (AUC) values for diagnosing muscle invasion were as follows: conventional VI-RADS, 0.94 and 0.91; NCE-VI-RADS, 0.93 and 0.91; and "NCE-VI-RADS with dDLR", 0.96 and 0.93, for readers 1 and 2, respectively. Simple κ statistics indicated substantial agreement for NCE-VI-RADS and almost perfect agreement for conventional VI-RADS and "NCE-VI-RADS with dDLR" between the two readers. CONCLUSION NCE-VI-RADS achieved predictive accuracy for muscle invasion comparable to that of conventional VI-RADS. Additional use of dDLR improved the diagnostic accuracy of NCE-VI-RADS. KEY POINTS • Non-contrast-enhanced Vesical Imaging Reporting and Data System (NCE-VI-RADS) was developed to avoid risk related to gadolinium-based contrast agent administration. • NCE-VI-RADS had predictive accuracy for muscle invasion comparable to that of conventional VI-RADS. • The additional use of denoising deep learning reconstruction (dDLR) might further improve the diagnostic accuracy of NCE-VI-RADS.
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Yokomizo A, Yonese J, Egawa S, Fukuhara H, Uemura H, Nishimura K, Nagata M, Saito A, Lee T, Yamaguchi S, Nonomura N. Real-world use of enzalutamide in men with nonmetastatic castration-resistant prostate cancer in Japan. Int J Clin Oncol 2021; 27:418-426. [PMID: 34779962 PMCID: PMC8816761 DOI: 10.1007/s10147-021-02070-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 10/30/2021] [Indexed: 10/31/2022]
Abstract
BACKGROUND The purpose of the study is to evaluate real-world effectiveness and safety of enzalutamide in men with nonmetastatic castration-resistant prostate cancer (nmCRPC) in Japan. METHODS This was a retrospective evaluation of medical records from men in Japan who started enzalutamide treatment from November 1, 2014, to March 31, 2018, and received androgen deprivation therapy throughout. The primary endpoint was time to prostate-specific antigen (PSA) progression. Secondary endpoints included PSA response rate, time to first use of new antineoplastic therapy, time to first use of cytotoxic chemotherapy, and enzalutamide treatment duration. An exploratory analysis of metastasis-free survival (MFS) was also performed. Adverse events (AEs) were analyzed to assess safety. RESULTS Based on data from medical records of 205 men in Japan, median time to PSA progression was 27 months (95% confidence interval [CI] 19-not reached [NR]), with 82.5% and 52.0% of men achieving PSA response rates of ≥ 50% and ≥ 90%, respectively. Median time to first use of new antineoplastic therapy was 36 months (95% CI 27-NR) and median enzalutamide treatment duration was 13 months (interquartile range: 7-24). Median time to first use of cytotoxic chemotherapy was NR (95% CI 41-NR). Median MFS was 29 months (95% CI 23-35). In total, 51.7% of men experienced AEs, with malaise (18.5%), decreased appetite (10.7%), and nausea (4.9%) the most frequently reported. CONCLUSIONS This is the first study to demonstrate the real-world effectiveness and safety of enzalutamide in men with nmCRPC in Japan, further informing healthcare providers about available treatment options for this patient population.
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Kato T, Nakamori M, Matsumura S, Nakamura M, Ojima T, Fukuhara H, Ino Y, Todo T, Yamaue H. Oncolytic virotherapy with human telomerase reverse transcriptase promoter regulation enhances cytotoxic effects against gastric cancer. Oncol Lett 2021; 22:800. [PMID: 34630707 PMCID: PMC8477072 DOI: 10.3892/ol.2021.13061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
[This retracts the article DOI: 10.3892/ol.2021.12751.].
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Uchihashi T, Nakahara H, Fukuhara H, Iwai M, Ito H, Sugauchi A, Tanaka M, Kogo M, Todo T. Oncolytic herpes virus G47Δ injected into tongue cancer swiftly traffics in lymphatics and suppresses metastasis. MOLECULAR THERAPY-ONCOLYTICS 2021; 22:388-398. [PMID: 34553027 PMCID: PMC8430046 DOI: 10.1016/j.omto.2021.06.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 06/09/2021] [Indexed: 01/02/2023]
Abstract
The prognosis of oral squamous cell carcinoma (OSCC) largely depends on the control of lymph node metastases. We evaluate the therapeutic efficacy of G47Δ, a third-generation oncolytic herpes simplex virus type 1 (HSV-1), in mouse tongue cancer models. Intratumoral injection with G47Δ prolonged the survival in all orthotopic models investigated. In both athymic and immunocompetent models, G47Δ injected into the tongue cancer swiftly traffics to the draining cervical lymph nodes and suppresses lymph node metastases. In the immunocompetent KLN205-MUC1 model, in which the metastatic cascade that tongue cancer patients commonly experience is reproduced, intratumoral G47Δ injection even immediately prior to a tumor resection prolonged survival. Cervical lymph nodes 18 h after G47Δ treatment showed the presence of G47Δ infection and an increase in CD69-positive cells, indicating an immediate activation of T cells. Furthermore, G47Δ injected directly into enlarged metastatic lymph nodes significantly prolonged the survival at an advanced stage. Whereas intratumorally injected oncolytic HSV-1 does not readily circulate in the blood stream, G47Δ is shown to traffic in the lymphatics swiftly. The use of G47Δ can lead to entirely new treatment strategies for tongue cancer and other OSCC at all clinical stages.
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Kinjo M, Tanba M, Masuda K, Nakamura Y, Tanbo M, Fukuhara H. Comparison of effectiveness between modified transvaginal mesh surgery and vaginal pessary treatment in patients with symptomatic pelvic organ prolapse. Low Urin Tract Symptoms 2021; 14:64-71. [PMID: 34523239 DOI: 10.1111/luts.12411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/31/2021] [Accepted: 08/25/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVES This study aimed to compare the efficacy of modified transvaginal mesh (TVM) surgery and vaginal pessary in patients with symptomatic pelvic organ prolapse (POP). METHODS We retrospectively analyzed 130 patients with symptomatic POP treated with either modified TVM (n = 62) or vaginal pessary (n = 68). To evaluate the prolapse, lower urinary tract, bowel, and sexual symptoms and prolapse-related quality of life (QOL) were assessed using the prolapse QOL questionnaire. All questionnaires were completed before treatment and 1 year after the treatment. RESULTS One year after the treatment, the prolapse and voiding symptoms and all prolapse-related QOL domains, except for the personal relationships and sleep/energy, were significantly improved in the pessary group. The prolapse, urinary storage, voiding, bowel, and sexual symptoms and all QOL domains significantly improved in the modified-TVM group. CONCLUSIONS Both the modified TVM surgery and vaginal pessary effectively treated prolapse and voiding symptoms and improved most of the prolapse-related QOL domains. Modified TVM surgery was more effective in improving urinary storage, bowel, and sexual symptoms than the pessary treatment. Modified TVM seemed to position the organs more correctly to improve bladder, bowel, and sexual function than pessary insertion.
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Kitamura J, Taguchi S, Okegawa T, Honda K, Kii T, Tomida Y, Matsumoto R, Ninomiya N, Masuda K, Nakamura Y, Yamaguchi T, Kinjo M, Tambo M, Isomura A, Hayashi A, Kamma H, Higashihara E, Shibahara J, Fukuhara H. Genomic analysis of circulating tumor cells in adenosquamous carcinoma of the prostate: a case report. BMC Med Genomics 2021; 14:217. [PMID: 34479548 PMCID: PMC8418023 DOI: 10.1186/s12920-021-01068-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 08/27/2021] [Indexed: 11/24/2022] Open
Abstract
Background Adenosquamous carcinoma of the prostate (ASCP) is an extremely rare and aggressive prostate cancer variant, whose genomic characteristics have not been elucidated. Although liquid biopsy of circulating tumor cells (CTCs) is an emerging topic in oncology, no study has assessed CTCs in patients with ASCP. Case presentation. A 76-year-old man presented with discomfort in his urethra. His prostate-specific antigen (PSA) level was 13.37 ng/mL. A computed tomography (CT) scan indicated a prostate mass with multiple lymph node and lung metastases. The patient underwent transurethral resection of the prostate and prostatic needle biopsy; both specimens demonstrated Gleason grade group 5 acinar adenocarcinoma of the prostate. Bone scintigraphy indicated bone metastasis in the ischium. Combined androgen blockade was implemented, and his serum PSA level rapidly decreased to 0.01 ng/mL. However, a CT scan 6 months after the initial diagnosis revealed worsening of the disease. The patient therefore underwent repeated prostatic needle biopsy; its specimen demonstrated prostatic adenocarcinoma together with squamous carcinoma components. As immunohistochemical analyses showed the tumor cells to be negative for CD56, chromogranin A, synaptophysin, and PSA, the definitive diagnosis was ASCP. Although the patient underwent chemotherapy (docetaxel and cabazitaxel), he died of the disease 3 months after the diagnosis of ASCP, or 13 months after the initial diagnosis of prostatic adenocarcinoma. His PSA values remained ≤ 0.2 ng/mL. CTCs from the patient’s blood (collected before starting docetaxel) were analyzed and genomically assessed. It showed 5 cytokeratin (CK)+ CTCs, 14 CK− CTCs, and 8 CTC clusters, per 10 mL. Next-generation sequencing identified a total of 14 mutations in 8 oncogenes or tumor suppressor genes: PIK3CB, APC, CDKN2A, PTEN, BRCA2, RB1, TP53, and CDK12. Of 14 mutations, 9 (64%) were detected on CK− CTCs and 5 (36%) were detected on CK+ CTCs. Conclusions This is the first report of CTC analysis and genomic assessment in ASCP. Although the prognosis of ASCP is dismal due to lack of effective treatment, genomic analysis of CTCs might lead to effective treatment options and improved survival.
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Taguchi S, Kawai T, Nakagawa T, Nakamura Y, Kamei J, Obinata D, Yamaguchi K, Kaneko T, Kakutani S, Tokunaga M, Uemura Y, Sato Y, Fujimura T, Fukuhara H, Enomoto Y, Nishimatsu H, Takahashi S, Kume H. Prognostic significance of the albumin-to-globulin ratio for advanced urothelial carcinoma treated with pembrolizumab: a multicenter retrospective study. Sci Rep 2021; 11:15623. [PMID: 34341416 PMCID: PMC8329063 DOI: 10.1038/s41598-021-95061-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 07/20/2021] [Indexed: 12/16/2022] Open
Abstract
Although the albumin-to-globulin ratio (AGR) is a promising biomarker, no study has investigated its prognostic significance for advanced urothelial carcinoma (UC). This study conformed to the REporting recommendations for tumor MARKer prognostic studies (REMARK) criteria. We retrospectively reviewed 176 patients with advanced UC treated with pembrolizumab between 2018 and 2020. We evaluated the associations between pretreatment clinicopathological variables, including the AGR and performance status (PS), with progression-free survival, cancer-specific survival, and overall survival. The Cox proportional hazards model was used for univariate and multivariable analyses. The AGR was dichotomized as < 0.95 and ≥ 0.95 based on receiver operating characteristic curve analysis. After excluding 26 cases with missing data from the total of 176 cases, 109 (73%) patients experienced disease progression, 75 (50%) died from UC, and 6 (4%) died of other causes (median survival = 12 months). Multivariate analyses identified PS ≥ 2 and pretreatment AGR < 0.95 as independent poor prognostic factors for all endpoints. Furthermore, a prognostic risk model incorporating these two variables achieved a relatively high concordance index for all endpoints. This is the first report to evaluate the significance of AGR in advanced UC. Pretreatment AGR < 0.95 may serve as a prognostic marker for advanced UC treated with pembrolizumab.
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Fukuhara H, Takeshima Y, Todo T. Triple-mutated oncolytic herpes virus for treating both fast- and slow-growing tumors. Cancer Sci 2021; 112:3293-3301. [PMID: 34036669 PMCID: PMC8353919 DOI: 10.1111/cas.14981] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 05/05/2021] [Accepted: 05/11/2021] [Indexed: 11/29/2022] Open
Abstract
Oncolytic virus therapy has emerged as a promising treatment option against cancer. To date, oncolytic viruses have been developed for malignant tumors, but the need for this new therapeutic modality also exists for benign and slow‐growing tumors. G47∆ is an oncolytic herpes simplex virus type 1 (HSV‐1) with an enhanced replication capability highly selective to tumor cells due to genetically engineered, triple mutations in the γ34.5, ICP6 and α47 genes. To create a powerful, but safe oncolytic HSV‐1 that replicates efficiently in tumors regardless of growth speed, we used a bacterial artificial chromosome system that allows a desired promoter to regulate the expression of the ICP6 gene in the G47∆ backbone. Restoration of the ICP6 function in a tumor‐specific manner using the hTERT promoter led to a highly capable oncolytic HSV‐1. T‐hTERT was more efficacious in the slow‐growing OS‐RC‐2 and DU145 tumors than the control viruses, while retaining a high efficacy in the fast‐growing U87MG tumors. The safety features are also retained, as T‐hTERT proved safe when inoculated into the brain of HSV‐1 sensitive A/J mice. This new technology should facilitate the use of oncolytic HSV‐1 for all tumors irrespective of growth speed.
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Tohi Y, Kato T, Yokomizo A, Mitsuzuka K, Tomida R, Inokuchi J, Matsumoto R, Saito T, Sasaki H, Inoue K, Kinoshita H, Fukuhara H, Maruyama S, Sakamoto S, Tanikawa T, Egawa S, Ichikura H, Abe T, Nakamura M, Kakehi Y, Sugimoto M. Impact of health-related quality of life on repeat protocol biopsy compliance on active surveillance for favorable prostate cancer: results from a prospective cohort in the PRIAS-JAPAN study. Urol Oncol 2021; 40:56.e9-56.e15. [PMID: 34112576 DOI: 10.1016/j.urolonc.2021.05.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 03/25/2021] [Accepted: 05/02/2021] [Indexed: 11/17/2022]
Abstract
OBJECTIVES This study aimed to evaluate how health-related quality of life (HRQOL) is related to repeat protocol biopsy compliance. MATERIALS AND METHODS We conducted a retrospective analysis using data from a prospective cohort in the Prostate Cancer Research International: Active Surveillance (PRIAS)-JAPAN study between January 2010 and August 2019. We used the Short Form 8 Health Survey (SF-8), as patient-reported outcomes, to assess HRQOL at AS enrollment and the first year of the protocol. The physical component summary (PCS) and mental component summary (MCS) were calculated from SF-8 questionnaires. The primary outcome was the evaluation of the association of HRQOL at enrollment on the first repeat biopsy compliance. The secondary outcome was the comparison of SF-8 scores during AS, stratified by repeat protocol biopsy compliance. RESULTS Of 805 patients who proceeded to the first year of the protocol, the non-compliance rate was 15% (121 patients). In the adjusted model, lower MCS at enrollment was significantly associated with the first repeat protocol biopsy non-compliance (odds ratio [OR], 2.134; 95% confidence interval [CI], 1.031-4.42; P = 0.041) but not in lower PCS (OR, 0.667; 95% CI, 0.294-1.514; P = 0.333). All subscales of SF-8 were lower in the non-compliance group than in the compliance group at any point. MCS in the non-compliance group improved over time from the time of AS enrollment (2.34 increased, P = 0.152). CONCLUSION Our data suggest that lower MCS at AS enrollment using patient-reported outcomes was negatively associated with the first repeat protocol biopsy compliance. Our study may support the availability of a simple questionnaire to extract non-compliance.
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Tohi Y, Kato T, Yokomizo A, Mitsuzuka K, Tomida R, Inokuchi J, Matsumoto R, Saito T, Sasaki H, Inoue K, Kinoshita H, Fukuhara H, Maruyama S, Sakamoto S, Tanikawa T, Egawa S, Ichikura H, Abe T, Nakamura M, Kakehi Y, Sugimoto M. Impact of health-related quality of life on repeat protocol biopsy compliance on active surveillance for favorable prostate cancer: Results from a prospective cohort in the PRIAS-JAPAN study. Eur Urol 2021. [DOI: 10.1016/s0302-2838(21)01410-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Shishido T, Okegawa T, Hayashi K, Masuda K, Taguchi S, Nakamura Y, Tambo M, Fukuhara H. Laparoscopic retroperitoneal lymph node dissection versus open retroperitoneal lymph node dissection for testicular cancer: A comparison of clinical and perioperative outcomes. Asian J Urol 2021; 9:119-124. [PMID: 35509484 PMCID: PMC9051357 DOI: 10.1016/j.ajur.2021.05.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 05/12/2020] [Accepted: 10/14/2020] [Indexed: 11/30/2022] Open
Abstract
Objective This study was performed to evaluate the clinical and perioperative outcomes of laparoscopic retroperitoneal lymph node dissection (L-RPLND) and open retroperitoneal lymph node dissection (O-RPLND) performed by one surgeon at a single center. Methods We evaluated 30 patients with stage IIA germ cell tumors who underwent retroperitoneal lymph node dissection (15 underwent L-RPLND and 15 underwent O-RPLND) at our institution between April 1, 2010 and March 31, 2018. The clinical parameters were compared between patients who underwent L-RPLND using the retroperitoneal approach and those who underwent O-RPLND using the transperitoneal approach. There were no significant differences in the background characteristics of the two groups except for the median follow-up duration (46 months for L-RPLND and 71 months for O-RPLND, p=0.02). Results L-RPLND was associated with a shorter mean operative time (mean 222 min for L-RPLND vs. 453 min for O-RPLND, p<0.001). There was significantly less blood loss during surgery in the L-RPLND group compared to the O-RPLND group (mean 165 mL for L-RPLND vs. 403 mL for O-RPLND, p<0.001). Parameters related to postoperative recovery were significantly better for the L-RPLND group than for the O-RPLND group. There were no differences in the histopathological characteristics between the two groups. No patients in either group exhibited disease recurrence. Conclusion Patients who underwent L-RPLND had more rapid recovery, and shorter hospital stay compared to those who underwent O-RPLND; complications were comparable between the two groups. L-RPLND is an efficient procedure with the benefits of minimally invasive surgery.
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Kii T, Taguchi S, Nagahama K, Shimoyamada H, Honda K, Tomida Y, Matsumoto R, Kitamura J, Ninomiya N, Masuda K, Nakamura Y, Yamaguchi T, Kinjo M, Tambo M, Okegawa T, Higashihara E, Shibahara J, Fukuhara H. Pigmented median raphe cyst of the penis that developed after middle age without infection or trauma history. IJU Case Rep 2021; 4:172-175. [PMID: 33977252 PMCID: PMC8088894 DOI: 10.1002/iju5.12271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 02/14/2021] [Indexed: 11/06/2022] Open
Abstract
INTRODUCTION Median raphe cysts are rare benign lesions of the male genitalia that can develop anywhere along the midline from meatus to anus. They are believed to be caused by a defect in closure of median raphe during embryonic development. These cysts commonly appear in childhood or adolescence, although some are diagnosed after middle age, typically triggered by infection or trauma. Pigmented median raphe cysts, or those containing melanin pigment and/or melanocytes, are extremely rare. CASE PRESENTATION A 78-year-old man visited our hospital with a complaint of a penile mass that he first noticed in his 50s which slowly grew, eventually causing voiding difficulty. He had no history of infection or trauma. The lesion was excised, and the pathological diagnosis was pigmented median raphe cyst. CONCLUSION We successfully treated a rare case of pigmented median raphe cyst of the penis that developed after middle age without infection or trauma history.
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Kato T, Nakamori M, Matsumura S, Nakamura M, Ojima T, Fukuhara H, Ino Y, Todo T, Yamaue H. Oncolytic virotherapy with human telomerase reverse transcriptase promoter regulation enhances cytotoxic effects against gastric cancer. Oncol Lett 2021; 21:490. [PMID: 33968206 PMCID: PMC8100961 DOI: 10.3892/ol.2021.12751] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 03/18/2021] [Indexed: 12/19/2022] Open
Abstract
Currently, gastric cancer is the third most common cause of cancer-associated mortality worldwide. Oncolytic virotherapy using herpes simplex virus (HSV) has emerged as a novel therapeutic strategy against cancer. Telomerase is activated in >90of malignant tumors, including gastric cancer, and human telomerase reverse transcriptase (hTERT) is one of the major components of telomerase enzyme. Therefore, in oncolytic HSV, placing the essential genes under the regulation of the hTERT promoter may enhance its antitumor efficacy. The present study examined the antitumor effect of fourth-generation oncolytic HSVs, which contain the ICP6 gene under the regulation of the hTERT promoter (T-hTERT). To examine the association between hTERT expression and prognosis in patients with gastric cancer, immunohistochemical analysis of resected tumor specimens was performed. The enhanced efficacy of T-hTERT was determined in human gastric cancer cell lines in vitro and in human gastric adenocarcinoma specimens in vivo. In in vitro experiments, enhanced cytotoxicity of T-hTERT was observed in MKN1, MKN28 and MKN45 cells compared with that of a third-generation oncolytic HSV, T-null. In particular, the cytotoxicity of T-hTERT was markedly enhanced in MKN45 cells. Furthermore, in vivo experiments demonstrated that 36.7 and 54.9% of cells were found to be lysed 48 h after infection with T-null or T-hTERT viruses at 0.01 pfu/cell, respectively. The T-hTERT-treated group exhibited considerably lower cell viability than the control [phosphate-buffered saline (-)] group. Therefore, employing oncolytic HSVs that contain the ICP6 gene under the regulation of the hTERT promoter may be an effective therapeutic strategy for gastric cancer. To the best of our knowledge, the present study was the first to describe the effect of an oncolytic HSV with ICP6 expression regulated by the hTERT promoter on gastric cancer cells.
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Matsumura S, Nakamori M, Tsuji T, Kato T, Nakamura M, Ojima T, Fukuhara H, Ino Y, Todo T, Yamaue H. Oncolytic virotherapy with SOCS3 enhances viral replicative potency and oncolysis for gastric cancer. Oncotarget 2021; 12:344-354. [PMID: 33659045 PMCID: PMC7899552 DOI: 10.18632/oncotarget.27873] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 01/19/2021] [Indexed: 12/15/2022] Open
Abstract
Oncolytic virotherapy is an encouraging treatment using herpes simplex virus (HSV) for gastric cancer patients. To treat gastric cancer, we generated and evaluated the efficacy of an attractive type of oncolytic HSV expressing the suppressor of cytokine signaling 3 (SOCS3). We constructed a third-generation type of oncolytic HSV (T-SOCS3) arming with SOCS3 by a bacterial artificial chromosome (BAC) system. We examined the viral replicative intensification and oncolysis of T-SOCS3 for human gastric cancer cell lines ex vivo. T-SOCS3 enhanced its replication and potentiated its cell-killing effect for MKN1 human gastric cancer cell lines, which are resistant to a non-armed third-generation type of oncolytic HSV (T-01) ex vivo. T-SOCS3 also induced the destruction within human gastric cancer specimens. Armed oncolytic HSVs expressing SOCS3 may be an efficacious therapeutic agent for gastric cancer treatment.
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Taguchi S, Morikawa T, Shibahara J, Fukuhara H. Prognostic significance of tertiary Gleason pattern in the contemporary era of Gleason grade grouping: A narrative review. Int J Urol 2021; 28:614-621. [PMID: 33580599 DOI: 10.1111/iju.14524] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 01/17/2021] [Indexed: 01/18/2023]
Abstract
Since the Gleason score was developed in 1966 as a histological classification for prostate cancer, it has been widely used in clinical practice and has evolved over time. The concept of a "tertiary Gleason pattern" (also known as a minor Gleason pattern) was first proposed in 2000, and has been used in clinical practice since the 2005 International Society of Urological Pathology conference. The prognostic significance of a tertiary Gleason pattern has been widely validated in various settings of prostate cancer, whereas its definition has yet to be fully established. Currently, a provisional definition of tertiary Gleason pattern is "<5% Gleason pattern 4 or 5 in radical prostatectomy specimens." In contrast, "Gleason grade grouping" was proposed in 2013 and came into use in clinical practice in 2016 according to the 2014 International Society of Urological Pathology conference. Although the prognostic significance of Gleason grade grouping has already been widely confirmed, it does not incorporate the concept of tertiary Gleason pattern. Recently, the 2019 International Society of Urological Pathology conference discussed how to handle tertiary Gleason pattern in the current Gleason scoring system, but no consensus was reached on the issue. This review summarizes the evidence on the prognostic significance of tertiary Gleason pattern and discusses how to deal with it in the context of the contemporary Gleason grade grouping. It also refers to reporting of the percentage of Gleason patterns 4 and 5, as well as quantitative Gleason score models incorporating tertiary Gleason pattern.
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Taguchi S, Nakagawa T, Uemura Y, Akamatsu N, Gonoi W, Naito A, Kawai T, Kume H, Fukuhara H. Comparison of major definitions of sarcopenia based on the skeletal muscle index in patients with urothelial carcinoma. Future Oncol 2020; 17:197-203. [PMID: 33305603 DOI: 10.2217/fon-2020-0570] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
For the past decade, sarcopenia has been actively investigated in various cancers, including urothelial carcinoma (UC). Although skeletal muscle index (SMI) is the main parameter used to evaluate sarcopenia in oncology, the optimal definition of SMI-based sarcopenia is not entirely standardized. We recently highlighted the potential limitations of current definitions of SMI-based sarcopenia in another journal. In this study, we reviewed studies that assessed sarcopenia in UC patients. We then performed a comparative validation of three major SMI-based definitions of sarcopenia, including Prado's, the international and Martin's definitions in metastatic UC patients. We believe that the standardization of the sarcopenia definition is an urgent issue in oncology, and this paper discusses a possible new direction to address this issue.
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Higashihara E, Horie S, Muto S, Kawano H, Tambo M, Yamaguchi T, Taguchi S, Kaname S, Yokoyama K, Yoshioka T, Furukawa T, Fukuhara H. Imaging Identification of Rapidly Progressing Autosomal Dominant Polycystic Kidney Disease: Simple Eligibility Criterion for Tolvaptan. Am J Nephrol 2020; 51:881-890. [PMID: 33227802 DOI: 10.1159/000511797] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Accepted: 09/23/2020] [Indexed: 12/27/2022]
Abstract
BACKGROUND Tolvaptan was approved for the treatment of autosomal dominant polycystic kidney disease (ADPKD). However, the official indication of "rapidly progressive disease" is described differently in the clinical guidelines. We aim to define "rapidly progressive disease" by risk of ESRD, which is evaluated using estimated height-adjusted total kidney volume (HtTKV) growth rate. METHODS The risk of ESRD was retrospectively analyzed in 617 initially non-ESRD adults with ADPKD and observed with standard of care between 2007 and 2018. The estimated annual growth rate of the HtTKV, termed as eHTKV-α (%/year), is derived from the following equation: [HtTKV at age t] = K(1 + eHTKV-α/100)t, where K = 150 mL/m is used in Mayo Imaging Classification and K = 130 mL/m is proposed for individually stable eHTKV-α value from baseline. The accuracy of eHTKV-α to predict ESRD for censored ages was analyzed using time-dependent receiver-operating characteristic curves (ROC). The cutoff point of initially measured eHTKV-α to predict ESRD was assessed using Kaplan-Meier and Cox's proportional hazards models. Performance characteristics of the cutoff point for censored ages were calculated using time-dependent ROC and validated by the bootstrap method. RESULTS The area under the time-dependent ROC of eHTKV-α to predict ESRD at age 65 was 0.89 ± 0.04 (K = 130). The mean renal survival was less than 70 years at eHTKV-α ≥4.0%/year (K = 130). Mean renal survival was approximately 12 years shorter, and hazard ratio of ESRD was more than 5-time higher at this cutoff point than at lower point. Time-dependent sensitivity for age 65 and cutoff point of 4.0%/year (K = 130) was 93.4 ± 0.3%. Between cutoff points ≥4.0%/year (K = 130) and ≥3.5%/year (K = 150), there was no significant difference in performance characteristics and accuracy to predict ESRD. CONCLUSION eHTKV-α well predicts ESRD. Initially, measured eHTKV-α ≥4.0%/year (K = 130) defines high-risk ESRD. Without additional conditions, a single eHTKV-α cutoff point identifies subjects that are most likely to benefit from tolvaptan.
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Kinjo M, Masuda K, Nakamura Y, Taguchi S, Tambo M, Okegawa T, Fukuhara H. Effects on Depression and Anxiety After Mid-Urethral Sling Surgery for Female Stress Urinary Incontinence. Res Rep Urol 2020; 12:495-501. [PMID: 33117749 PMCID: PMC7585269 DOI: 10.2147/rru.s270915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 09/16/2020] [Indexed: 11/23/2022] Open
Abstract
Purpose Urinary incontinence (UI) is a common health-related problem in the female population and has a negative impact on many aspects of patients’ quality of life including mental problems. This study evaluated the mental effects of mid-urethral sling (MUS) surgery in female patients with stress UI or stress UI-dominant mixed UI. Patients and Methods Women with stress UI or stress UI-dominant mixed UI who underwent MUS surgery and were enrolled in this study and followed up for 12 months. The International Consultation of Incontinence Questionnaire-Short Form (ICIQ-SF) and the Hospital Anxiety and Depression Scale (HADS) at baseline and 12 months after the MUS to evaluate the efficacy of the surgery. Results At baseline, proportions of the patients with anxiety (HADS-Anxiety score of ≥8) and depression (HADS-Depression score of ≥8) were 21.6% (22/102) and 24.5% (25/102), respectively. At 12 months postoperatively, the median ICIQ-SF score, HADS-Anxiety score, and HADS-Depression score were significantly improved compared with their baseline values (p<0.001 for ICIQ-SF and HADS-Depression, p=0.011 for HADS-Anxiety). At 12 months postoperatively, changes in the ICIQ-SF and HADS-A scores showed a moderate correlation (r = 0.578, p < 0.001), and changes in the ICIQ-SF and HADS-D scores had a strong correlation (r = 0.838, p <0.001). Conclusion This study demonstrated that MUS surgery significantly improved UI, anxiety, and depression with significant correlations in their symptoms. This suggests that improvement of the patients’ UI helped to relieve their symptoms of anxiety and depression.
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Taguchi S, Shiraishi K, Fukuhara H. Updated evidence on oncological outcomes of surgery versus external beam radiotherapy for localized prostate cancer. Jpn J Clin Oncol 2020; 50:963-969. [PMID: 32580211 DOI: 10.1093/jjco/hyaa105] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 05/31/2020] [Indexed: 11/12/2022] Open
Abstract
Radical prostatectomy and external beam radiotherapy are recognized as comparable treatment options for localized prostate cancer. Previous studies of oncological outcomes of surgery versus radiotherapy have reported their comparability or possible superiority of surgery. However, the issue of which treatment is better remains controversial. Several factors make fair comparison of their outcomes difficult: different patient backgrounds caused by selection bias, different definitions of biochemical recurrence and different complication profiles between the treatment modalities. In 2016, the first large randomized controlled trial was published, which compared radical prostatectomy, external beam radiotherapy and active monitoring in localized prostate cancer. More recently, another study has reported comparative outcomes of robot-assisted radical prostatectomy and volumetric modulated arc therapy, as the leading surgery and radiotherapy techniques, respectively. Furthermore, there has been a trend toward combining external beam radiotherapy with brachytherapy boost, especially in patients with high-risk prostate cancer. This review summarizes the updated evidence on oncological outcomes of surgery versus external beam radiotherapy for localized prostate cancer.
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Higashihara E, Fukuhara H, Ouyang J, Lee J, Nutahara K, Tanbo M, Yamaguchi T, Taguchi S, Muto S, Kaname S, Miyazaki I, Horie S. Estimation of Changes in Kidney Volume Growth Rate in ADPKD. Kidney Int Rep 2020; 5:1459-1471. [PMID: 32954070 PMCID: PMC7486344 DOI: 10.1016/j.ekir.2020.06.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 05/24/2020] [Accepted: 06/10/2020] [Indexed: 10/30/2022] Open
Abstract
Introduction In the Mayo Imaging Classification (MIC) for autosomal dominant polycystic kidney disease (ADPKD), the height-adjusted total kidney volume (HtTKV) growth rate is estimated for classification. Estimated HtTKV slope, termed as eHTKV-α, is calculated by the equation [HtTKV at age t] = K(1+α/100)(t-A), where K = 150 and A = 0 are used in MIC. If eHTKV-α is nearly stable during a standard-of-care period, the change in eHTKV-α from baseline can be used for estimation of the treatment effect on the HtTKV slope. Methods The constancy of eHTKV-α (A = 0 and K = 150) was evaluated using 453 placebo-assigned subjects in the Tolvaptan Efficacy and Safety in Management of ADPKD and Its Outcomes (TEMPO) 3:4 trial. A and K were sought out respectively by a converged pattern of regression lines of log10(HtTKV) plotted against age for subgroups divided according to MIC, and by change in eHTKV-α from baseline. A total of 239 standard-of-care patients from the Kyorin University Cohort (KUC) served as validation. Changes in eHTKV-α from baseline were evaluated in 809 tolvaptan-treated subjects in TEMPO 3:4. Results In placebo-assigned subjects, eHTKV-α (A = 0 and K = 150) changed significantly from baseline at the third year. As regression lines of placebo-assigned subgroups converged around age 0, A was set as 0, which was confirmed by KUC. K = 130 was selected because of minimal change in eHTKV-α from baseline. The KUC validated the constancy of eHTKV-α (A = 0 and K = 130) but not that of eHTKV-α (A=0 and K=150). In tolvaptan-treated subjects, eHTKV-α remained significantly lower than baseline for 3 years. Conclusions eHTKV-α (A = 0 and K = 130) was nearly stable from baseline through follow-up in standard-of-care adults. Treatment effects on the HtTKV slope can be estimated by changes in eHTKV-α from baseline.
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Omura S, Taguchi S, Miyagawa S, Matsumoto R, Samejima M, Ninomiya N, Masuda K, Nakamura Y, Yamaguchi T, Kinjo M, Tambo M, Okegawa T, Higashihara E, Fukuhara H. Prognostic significance of the albumin-to-globulin ratio for upper tract urothelial carcinoma. BMC Urol 2020; 20:133. [PMID: 32859201 PMCID: PMC7456038 DOI: 10.1186/s12894-020-00700-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 08/19/2020] [Indexed: 01/26/2023] Open
Abstract
Background Although the albumin-to-globulin ratio (AGR) is a promising biomarker for various malignancies, few studies have investigated its prognostic significance for upper tract urothelial carcinoma (UTUC). Methods This retrospective study conformed to the REporting recommendations for tumour MARKer prognostic studies (REMARK) guideline. We reviewed 179 patients with UTUC who underwent radical nephroureterectomy at our institution between 2008 and 2018. Associations of preoperative clinicopathological factors, including the AGR, with cancer-specific survival (CSS) and overall survival (OS) were assessed. The Cox proportional hazards model was used for univariate and multivariable analyses. AGR was dichotomized as < 1.25 and ≥ 1.25, according to the most discriminatory cutoff determined from the receiver operating characteristic curve analysis. Results During a median follow-up of 34 months after surgery, 37 patients died from UTUC and 13 died of other causes. The preoperative AGR significantly correlated with pathological T stage, pathological N stage, and adjuvant chemotherapy. Multivariate analyses demonstrated that a decreased (< 1.25) preoperative AGR was an independent poor prognostic factor for both CSS (hazard ratio [HR] = 2.81, P < 0.01) and OS (HR = 2.09, P < 0.05). Conclusions Preoperative AGR < 1.25 might serve as a useful prognostic marker for patients with UTUC undergoing radical nephroureterectomy.
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Naito A, Taguchi S, Suzuki M, Kawai T, Uchida K, Fujimura T, Fukuhara H, Kume H. Transient acute kidney injury observed immediately after robot-assisted radical prostatectomy but not after open radical prostatectomy. Mol Clin Oncol 2020; 13:18. [PMID: 32754332 DOI: 10.3892/mco.2020.2087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 05/15/2020] [Indexed: 11/05/2022] Open
Abstract
Acute kidney injury (AKI) is a serious postoperative complication that occurs following laparoscopic surgery. However, its association with robot-assisted radical prostatectomy (RARP), the gold standard surgery for prostate cancer, is controversial. The current cohort included 257 patients with prostate cancer who underwent either RARP (n=187) or open radical prostatectomy (ORP; n=70). Patient serum creatinine concentration was measured at the following six time points: Prior to surgery, on postoperative day 0 (immediately after surgery), on postoperative day 1, 3 months after surgery, 1 year after surgery and 2 years after surgery. AKI was diagnosed according to the Kidney Disease: Improving Global Outcomes (KDIGO) criteria. A total of 25 RARP and 0 ORP patients met the KDIGO criteria on postoperative day 0. On postoperative day 1, 3 RARP and 2 ORP patients met the criteria, suggesting that AKI after RARP was a transient phenomenon. At 1 and 2 years after surgery, 5 of 257 patients exhibited a significant increase in serum creatinine concentrations from baseline results. Clinicians should be aware of transient AKI occurring after RARP, rather than ORP, to ensure better perioperative management in patients undergoing radical prostatectomy.
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Tambo M, Inoue T, Miura H, Matsuzaki J, Nutahara K, Hamamoto S, Okada S, Fukuhara H, Fujisawa M, Matsuda T. A Novel Flexible Ureteroscope with Omnidirectional Bending Tip Using Joystick-Type Control Unit (URF-Y0016): Initial Validation Study in Bench Models. J Endourol 2020; 34:676-681. [DOI: 10.1089/end.2019.0895] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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