Publications by authors named "Osamu Muraishi"

Introduction: Epidemiological data regarding complications after holmium laser enucleation of the prostate (HoLEP) are scarce in Japan. We examined the associations of the 24-hour pad test results immediately after HoLEP with continence acquisition at 3 months postoperatively.

Materials And Methods: In this hospital-based case-series study, we reviewed medical charts of 341 patients without catheterization and 150 patients with catheterization at the time of surgery.

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Introduction: To evaluate the incidence and risk factors for postoperative inguinal hernia (IH) after robot-assisted radical prostatectomy (RARP) and to assess whether a newly developed prevention technique reduces the incidence of IH after RARP.

Methods: We included 161 consecutive patients (322 groins) who underwent RARP between September 2011 and October 2013. The prevention technique was as follows: (1) sufficient incision of peritoneum around the internal inguinal ring; (2) separation of spermatic vessels; (3) dissection of vas deferens.

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Background: Gleason pattern 3 less often has molecular abnormalities and often behaves indolent. It is controversial whether low grade small foci of prostate cancer (PCa) on biopsy could avoid immediate treatment or not, because substantial cases harbor unfavorable pathologic results on prostatectomy specimens. This study was designed to identify clinical predictors for classical and redefined insignificant cancer on prostatectomy specimens in Japanese men with favorable pathologic features on biopsy.

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To evaluate the feasibility and reproducibility of a simple technique for identifying the initial cutting point of the bladder neck during robot-assisted radical prostatectomy. To precisely identify the prostatovesical junction, we first pulled the anterior bladder wall in an upward direction with the second arm to identify the precise location of the prostatovesical junction where anterior bladder neck dissection is initiated. After one experienced surgeon had established this technique, three surgeons who were less experienced in robot-assisted radical prostatectomy utilized this method for 50 consecutive robot-assisted radical prostatectomy cases.

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Introduction/background: Castration-resistant prostate cancer remains a therapeutic challenge, even after establishing the survival benefits of docetaxel chemotherapy. Metronomic chemotherapy stabilizes various cancers through antiangiogenic and immunomodulatory effects. We evaluate the activity of metronomic oral cyclophosphamide chemotherapy in metastatic CRPC patients, and assess predictive factors for clinical outcomes.

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We examined the association between prostate-specific antigen (PSA) and daily mean ambient temperature on the day of the test in healthy men who had three annual checkups. We investigated 9,694 men who visited a hospital for routine health checkups in 2007, 2008, and 2009. Although the means and medians of ambient temperature for the three years were similar, the mode in 2008 (15.

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Introduction: There is little evidence indicating whether dietary factors influence prostate-specific antigen (PSA) concentrations. We examined whether nutritional factors, including energy, protein, fat, and carbohydrate intake were associated with PSA in healthy men.

Subjects And Methods: We investigated 13,594 men aged 50 years and over who visited a hospital for a routine health checkup between 2003 and 2007.

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A 30-year-old man underwent a left high orchiectomy because of stage I testicular tumor in December, 2006. A palpable nodule was noticed in the contralateral testicle in March, 2008. No tumor marker was elevated.

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Background: Although many studies have shown an inverse relationship between diabetes and prostate cancer, it still remains unclear why diabetes may reduce the risk of prostate cancer. An inverse association between haemoglobin A(1C) (HbA(1C)) and prostate-specific antigen (PSA) also has been reported in previous studies that assessed the association cross-sectionally. To fully understand the relationship between diabetes and prostate cancer, it is essential to examine the association in a longitudinal design.

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Objectives: The prevalence of transient stress urinary incontinence (SUI) after HoLEP has been reported to be as high as 44%. Anteroposterior dissection HoLEP was newly developed to protect the urethral sphincter and therefore lower the incidence rate of SUI. This study was conducted to determine the SUI incidence rate after anteroposterior dissection HoLEP.

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Purpose: Several studies show that prostate specific antigen inversely correlates with body mass index. Hemodilution may be responsible for the lower prostate specific antigen in obese men. Hematocrit is the most popular indicator of plasma volume.

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Objective: Hospitalization and general anesthesia to perform transurethral resection of bladder tumors (BTs) may not be necessary for small recurrent BTs. We developed a new outpatient procedure.

Patients And Methods: Patients with recurrent small tumors who had previously undergone transurethral resection of BTs for low-grade, noninvasive BTs were eligible for this new procedure.

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A 75-year-old man visited our hospital with the complaint of lumbago due to bilateral hydronephrosis. Computed tomographic (CT) scan revealed a thick and homogeneous retroperitoneal soft-tissue mass with isodensity to the muscle, which extended from around the kidneys to the bladder. His serum IgG4 level was extremely high.

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Objectives: To examine whether a lower hematocrit was associated with a lower prostate-specific antigen (PSA), when stratifying by body mass index (BMI) in healthy men. PSA test is widely used in screening for prostate cancer. Many studies have found that PSA levels inversely correlate with BMI.

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A 39-year-old woman visited our hospital with a complaint of gross hematuria. Cystoscopy revealed a nodular tumor 3 cm in diameter in the posterior wall of the bladder. A transurethral resection was performed.

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Background: The neuroendocrine (NE) pathway has been attracting attention as a mechanism for the androgen-independent progression because the neuropeptide provokes tumor growth and inhibits apoptosis under androgen-deprived milieu in prostate cancer cells. On the basis that serum progastrin-releasing peptide (ProGRP) is elevated in patients with advanced disease stage, we examined the prognostic value of the neuropeptide.

Methods: Serum ProGRP status was determined with an enzyme-linked immunosorbent assay (ELISA) in 460 men with benign and malignant prostatic diseases, chronic renal failure, and healthy controls.

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Purpose: To achieve complete protection of the upper urinary tract in patients with a neobladder we designed and clinically applied the deserosalized muscle layer covering method, a new antireflux ureteroileal reimplantation technique in which the terminal ureter is implanted in the muscle layer of the ileum. We present the operative procedure and preliminary results.

Materials And Methods: We created an orthotopic ileal neobladder after radical cystectomy in 5 patients with invasive bladder cancer.

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Purpose: In pursuit of a more effective antireflux ureteroileostomy with a lower postoperative complication rate we performed a new operative technique and evaluated intraureteral pressure with ureterometry to examine the mechanism of antireflux function.

Materials And Methods: A total of 11 beagle dogs were used in this study. A 3 x 2 cm.

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Background: Increases in neuroendocrine phenotype and secretory products are closely correlated with tumor progression and androgen independence in prostate cancer. In this study, we explored this correlation using serum progastrin-releasing peptide (ProGRP), a carboxy-terminal region common to three subtypes of precursors for gastrin-releasing peptide (GRP), which is released from the neuroendocrine phenotype to act as a growth factor.

Methods: In 60 patients with benign prostatic hyperplasia (BPH) and 200 with prostate cancer, serum ProGRP levels were determined with an enzyme-linked immunosorbent assay (ELISA) kit and evaluated in relation to clinical stage, hormonal treatment, and prostate-specific antigen (PSA) values.

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Purpose: High serum carbohydrate antigen 19-9 in patients with hydronephrosis but without malignant disease is reportedly rare but to our knowledge the clinical features of hydronephrosis that affect this level have not yet been clarified. We examined the correlation of serum carbohydrate antigen 19-9 with hydronephrosis status in patients with benign hydronephrosis.

Materials And Methods: We used 123 serum samples from 68 patients with and 55 without hydronephrosis.

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