Publications by authors named "Toshihiro Saito"

Background: In Japan, since 2014, new treatments such as androgen receptor signaling inhibitors and cabazitaxel have become applicable for metastatic castration-resistant prostate cancer (mCRPC), leading to dramatic changes in treatment options.

Objective: This study aims to evaluate the impact of recent advancements in treatment options on the overall survival (OS) of patients diagnosed with de novo metastatic castration-sensitive prostate cancer (mCSPC) in Japan.

Methods: A retrospective analysis was conducted on 2450 Japanese men diagnosed with de novo mCSPC between 2008 and 2018.

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  • * A total of 383 patients were analyzed, revealing that those with persistent PSA levels post-surgery had significantly shorter castration resistance-free survival (CRFS) and metastasis-free survival (MFS) compared to those with non-persistent levels.
  • * The findings suggest that stratifying patients by PSA levels can help tailor postoperative treatment, with patients experiencing better outcomes when receiving a combination of androgen deprivation therapy and radiotherapy if their PSA levels are high.
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  • A multicenter study in Japan analyzed 515 patients with nonmetastatic castration-resistant prostate cancer (nmCRPC) to determine the best PSA doubling time (PSADT) cut-off for prognosis.
  • The study found that a PSADT of less than 4.65 months is a significant predictor for overall survival (OS) and cancer-specific survival (CSS), indicating worse outcomes.
  • Patients receiving novel hormonal therapy (NHT) had better progression-free survival (PFS) compared to those on older treatments, highlighting the benefits of newer treatment options.
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  • This study created a prognostic model to predict disease recurrence in patients with lymph node involvement but no ongoing PSA levels.
  • Researchers analyzed data from 231 patients who underwent surgery between 2006 and 2019, identifying key factors affecting recurrence-free survival (RFS).
  • The model, which includes parameters like initial PSA level and surgical margin status, is said to aid in treatment discussions with patients.
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Background: This study compared the clinical results of fracture stems and conventional stems using the same glenoid component in reverse shoulder arthroplasty for proximal humerus fractures in the elderly.

Methods: This retrospective study included 35 patients who underwent Grammont-type reverse shoulder arthroplasty for proximal humerus fractures from 2014 to 2020. The average age at surgery was 79.

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Objectives: This study aimed to evaluate whether oncological outcomes of radical prostatectomy differ depending on adherence to the criteria in patients who opt for active surveillance.

Materials And Methods: We retrospectively reviewed the data of 1035 patients enrolled in a prospective cohort of the PRIAS-JAPAN study. After applying the exclusion criteria, 136 of 162 patients were analyzed.

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The treatment for lymph node involvement (LNI) after radical prostatectomy (RP) has not been established. This study aimed to reveal the outcomes of various management strategies among patients with LNI after RP. Retrospectively, 561 patients with LNI after pelvic lymph node dissection (PLND) with RP treated between 2006 and 2019 at 33 institutions participating in the Japanese Urological Oncology Group were investigated.

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Objective: To determine the effect of combined androgen blockade with a first-generation anti-androgen on the prognoses of metastatic hormone-sensitive prostate cancer patients stratified by tumor burden.

Methods: We retrospectively analyzed the cases of metastatic hormone-sensitive prostate cancer patients who were treated with androgen deprivation therapy in 2008-2017 at 30 institutions in Japan. To compare the overall survival and progression-free survival rates of the patients treated with castration monotherapy and combined androgen blockade, we carried out a Cox proportional hazards regression analysis using both inverse probability of treatment weighting and instrumental variables methods.

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Purpose: This study aims to investigate the utility of prostate-specific antigen (PSA) screening by conducting an all-case survey of newly diagnosed prostate cancer patients at Niigata Prefecture, Japan.

Patients And Methods: Depending on whether patients were subjected to screening, information was prospectively collected on all prostate cancer patients newly diagnosed between October 1, 2019, and September 30, 2020, at all institutions in Niigata Prefecture where urologists performing prostate biopsy routinely work and differences in clinical parameters were investigated.

Results: PSA was measured in 478 out of 1332 patients (35.

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Article Synopsis
  • * Data was analyzed from 162 patients, revealing a 96.9% rate of being free from prostate-specific antigen recurrence after three years post-surgery.
  • * Results showed no significant differences in surgical outcomes between those who had immediate versus delayed surgery, suggesting that waiting to treat does not decrease curative chances in early-stage prostate cancer.
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Background: Understanding mechanisms of sugar accumulation and composition is essential to determining fruit quality and maintaining a desirable balance of sugars in plant storage organs. The major sugars in mature Rosaceae fruits are sucrose, fructose, glucose, and sorbitol. Among these, sucrose and fructose have high sweetness, whereas glucose and sorbitol have low sweetness.

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Black spot disease, which is caused by (Fries) Keissler Japanese pear pathotype, is one of the most harmful diseases in Japanese pear cultivation. Because of the potential harm of fungicides to consumers and the environment, resistant cultivars are desired. In this study, to enable efficient marker-assisted selection in pear breeding, we conducted comprehensive inoculation tests and genotyping with 207 pear cultivars.

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Background: There is no useful predictive marker for reclassification on active surveillance. Thus, we aimed to investigate thresholds of [-2] proPSA (p2PSA)-related parameters to predict reclassification of the first-year protocol biopsy (1-year PBx) and evaluate the influence of clinical decision-making.

Methods: This was an observational, prospective cohort study conducted at 19 Japanese institutes.

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The metastatic burden is a critical factor for decision-making in the treatment of metastatic hormone-sensitive prostate cancer (HSPC). This study aimed to develop and validate a novel risk model for survival in patients with de novo low- and high-burden metastatic HSPC. The retrospective observational study included men with de novo metastatic prostate cancer who were treated with primary androgen-deprivation therapy at 30 institutions across Japan between 2008 and 2017.

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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.

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Japanese chestnut (Castanea crenata Sieb. et Zucc.), the only fruit tree species domesticated in Japan, has been cultivated alongside natural stands since prehistorical times.

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Metastatic burden is a critical factor for therapy decision-making in metastatic hormone-sensitive prostate cancer. The present study aimed to identify prognostic factors in men with high- or low-metastatic burden treated with primary androgen-deprivation therapy. The study included 2450 men with de novo metastatic prostate cancer who were treated with primary androgen-deprivation therapy at 30 institutions across Japan between 2008 and 2017.

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  • A study was conducted to examine how local radiotherapy (RT) affects survival rates and local symptom events in patients with newly diagnosed metastatic prostate cancer in Japan.
  • Among the 2829 patients, those receiving RT had significantly longer PSA progression-free survival (PSA-PFS) and overall survival (OS) compared to those who did not receive RT.
  • Additionally, patients in the RT group experienced fewer severe local events, suggesting that adding RT to standard treatment could improve outcomes and reduce complications even in patients with advanced disease.
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The Chinese chestnut (Castanea mollissima Bl.) was introduced into Japan about 100 years ago. Since then, a number of Chinese chestnut cultivars and Japanese-Chinese hybrid cultivars have been selected by farmers and plant breeders, but little information has been available about their origins and genetic relationships.

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Background: To predict long-term treatment outcome of radiation therapy (RT) plus androgen deprivation therapy (ADT) for high-risk locally advanced prostate cancer.

Methods: In total, 204 patients with the National Comprehensive Cancer Network (NCCN) high risk locally advanced prostate cancer (PSA > 20 ng/ml, Gleason score ≧ 8, clinical T stage ≧ 3a) were treated with definitive RT with ADT. Median follow up period was 113 months (IQR: 95-128).

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Background: The number of cancer patients in Japan is estimated to rise to 3.5 million by 2025. The disease burden may be further complicated by comorbidities caused by cardiovascular disease (CVD).

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Breeding of fruit trees is hindered by their large size and long juvenile period. Genome-wide association study (GWAS) and genomic selection (GS) are promising methods for circumventing this hindrance, but preparing new large datasets for these methods may not always be practical. Here, we evaluated the potential of breeding populations evaluated routinely in breeding programs for GWAS and GS.

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A 73-year-old man with progressive prostate cancer visited our hospital after prostate biopsy performed at another hospital. His serum PSA level was 29.02 ng/ml.

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