Publications by authors named "Ryo Oka"

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Impact of Androgen Deprivation Therapy on Choroidal Microcirculation Assessed Using Laser Speckle Flowgraphy.
Ryuya Hashimoto, Ryo Oka, Naoki Fujioka, Kazufumi Tanaka, Moe Nunose

Microcirculation· January 2026

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Precision Care for Hereditary Urologic Cancers: Genetic Testing, Counseling, Surveillance, and Therapeutic Implications.
Takatoshi Somoto, Takanobu Utsumi, Rino Ikeda, Naoki Ishitsuka, Takahide Noro, Ryo Oka

Curr Oncol· December 2025

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External Validation and Comparative Performance of the T.O.HO. and S.T.O.N.E. Scoring Systems for Predicting Stone-Free Outcomes Following Flexible Ureteroscopy: Toward Personalized Preoperative Counseling.
Yuka Sugizaki, Takanobu Utsumi, Rino Ikeda, Naoki Ishitsuka, Takahide Noro, Ryo Oka

J Pers Med· October 2025

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Navigating Therapeutic Landscapes in Urothelial Cancer: From Chemotherapy to Precision Immuno-Oncology.
Takatoshi Somoto, Takanobu Utsumi, Rino Ikeda, Naoki Ishitsuka, Takahide Noro, Ryo Oka

Cancers (Basel)· October 2025

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Computer-aided diagnosis based on 3D deep convolutional neural network system using novel 3D magnetic resonance imaging sequences for high-grade prostate cancer.
Ryo Oka, Bochong Li, Seiji Kato, Takanobu Utsumi, Takumi Endo

Curr Urol· September 2025

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Development, Validation, and Clinical Utility of a Nomogram for Urological Tumors: How to Build the Best Predictive Model.
Takanobu Utsumi, Naoki Ishitsuka, Takahide Noro, Yuta Suzuki, Shota Iijima, Ryo Oka

Int J Urol· August 2025

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Impact of the COVID-19 Pandemic on Prostate Cancer: Perturbations in Screening and Diagnostic Patterns.
Takahide Noro, Takanobu Utsumi, Naoki Ishitsuka, Yuta Suzuki, Shota Iijima, Ryo Oka

Int J Urol· August 2025

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Clinical Predictors of Fluoroquinolone-Resistant Escherichia coli in Transrectal Ultrasound-Guided Prostate Biopsy: Insights for Tailored Prophylaxis.
Takatoshi Somoto, Takanobu Utsumi, Naoki Ishitsuka, Takahide Noro, Yuta Suzuki, Ryo Oka

Int J Urol· August 2025

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Predicting Urosepsis in Ureteral Calculi: External Validation of Hu's Nomogram and Identification of Novel Risk Factors.
Yuka Sugizaki, Takanobu Utsumi, Naoki Ishitsuka, Takahide Noro, Yuta Suzuki, Ryo Oka

Diagnostics (Basel)· April 2025

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Multidisciplinary Treatment for Lymphorrhea and Chylorrhea Following Lymph Node Dissection for Genitourinary Cancer.
Naoto Kamiya, Takahide Noro, Taro Okazaki, Naoki Ishitsuka, Yuta Suzuki, Ryo Oka

Cancers (Basel)· February 2025

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Progress in Oligometastatic Prostate Cancer: Emerging Imaging Innovations and Therapeutic Approaches.
Ryo Oka, Takanobu Utsumi, Takahide Noro, Yuta Suzuki, Shota Iijima

Cancers (Basel)· January 2024

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Laparoscopic adrenalectomy for adrenal tumors with endocrine activity: Perioperative management pathways for reduced complications and improved outcomes.
Takanobu Utsumi, Shota Iijima, Yuka Sugizaki, Takamichi Mori, Takatoshi Somoto, Ryo Oka

Int J Urol· October 2023

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Risk assessment of multi-factorial complications after transrectal ultrasound-guided prostate biopsy: a single institutional retrospective cohort study.
Takanobu Utsumi, Takumi Endo, Yuka Sugizaki, Takamichi Mori, Takatoshi Somoto, Ryo Oka

Int J Clin Oncol· December 2021

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Impact of Lymphovascular Invasion on Prognosis in the Patients with Bladder Cancer-Comparison of Transurethral Resection and Radical Cystectomy.
Kei Yoneda, Naoto Kamiya, Takanobu Utsumi, Ken Wakai, Ryo Oka

Diagnostics (Basel)· February 2021

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[SIGNIFICANCE OF IgG4 IN IDIOPATHIC RETROPERITONEAL FIBROSIS].
Masaaki Sanda, Naoto Kamiya, Yuka Sugizaki, Takamichi Mori, Masayasu Sugiyama, Ryo Oka

Nihon Hinyokika Gakkai Zasshi· January 2021

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Preoperative Clinical Predictors of Lymphovascular Invasion of Bladder Tumors at Transurethral Resection Pathology.
Kei Yoneda, Takanobu Utsumi, Ken Wakai, Ryo Oka, Takumi Endo

Curr Urol· October 2020

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Worsening of the low-density lipoprotein cholesterol to high-density lipoprotein cholesterol ratio in patients with prostate cancer after androgen deprivation therapy.
Ryo Oka, Takanobu Utsumi, Takumi Endo, Masashi Yano, Shuichi Kamijima

Asian J Androl· October 2019

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Development and external validation of a nomogram to predict high-grade papillary bladder cancer before first-time transurethral resection of the bladder tumor.
Ken Wakai, Takanobu Utsumi, Kei Yoneda, Ryo Oka, Takumi Endo

Int J Clin Oncol· October 2018

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External validation of two web-based postoperative nomograms predicting the probability of early biochemical recurrence after radical prostatectomy: a retrospective cohort study.
Kei Yoneda, Takanobu Utsumi, Takatoshi Somoto, Ken Wakai, Ryo Oka

Jpn J Clin Oncol· February 2018

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Clinical predictors for high-grade bladder cancer before first-time transurethral resection of the bladder tumor: a retrospective cohort study.
Ken Wakai, Takanobu Utsumi, Ryo Oka, Takumi Endo, Masashi Yano

Jpn J Clin Oncol· October 2016

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Effect of androgen deprivation therapy on arterial stiffness and serum lipid profile changes in patients with prostate cancer: a prospective study of initial 6-month follow-up.
Ryo Oka, Takanobu Utsumi, Takumi Endo, Masashi Yano, Shuichi Kamijima

Int J Clin Oncol· April 2016

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External validation and comparison of two nomograms predicting the probability of Gleason sum upgrading between biopsy and radical prostatectomy pathology in two patient populations: a retrospective cohort study.
Takanobu Utsumi, Ryo Oka, Takumi Endo, Masashi Yano, Shuichi Kamijima

Jpn J Clin Oncol· November 2015

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[CLINICOPATHOLOGICAL STUDY OF PROSTATE BIOPSY IN PATIENTS RECEIVING DUTASTERIDE FOR BENIGN PROSTATIC HYPERPLASIA].
Takumi Endo, Naoto Kamiya, Masashi Yano, Ryo Oka, Fung Ching Lee

Nihon Hinyokika Gakkai Zasshi· July 2015

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[Nutcracker syndrome treated by endovascular stenting of the left renal vein].
Ryo Oka, Naoto Kamiya, Keiko Sugiura, Takumi Endo, Masashi Yano

Nihon Hinyokika Gakkai Zasshi· November 2013

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