Toshikazu Nitta

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AIM Patients with superficial bladder tumors sometimes have long recurrence-free intervals. We evaluated whether patients with long recurrence-free periods had subsequent recurrences. We also clarified how these patients should be followed. MATERIALS AND METHODS We enrolled 244 patients with superficial bladder cancer (62 pTa and 182 pT1) treated by(More)
OBJECTIVES To clarify the influences of shock wave lithotripsy (SWL) treatments for renal and ureteropelvic junction stones on new onsets of hypertension and diabetes mellitus (DM). METHODS We compared the new onsets of hypertension and DM after SWL in renal and ureteral stone groups. The renal stone group consisted of 772 patients treated with SWL, who(More)
OBJECTIVES To study the dropout rate for use of sildenafil after initial prescription and during successful treatment to clarify their risk factors. METHODS A total of 1036 patients with erectile dysfunction who were treated with sildenafil were analyzed. The dropout rate during successful treatment and its risk factors were assessed using the(More)
We report a case of malacoplakia in the ureter and bladder. A 78-year-old woman was admitted to our department for detailed examination of hydronephrosis. A small-fingertip-sized tumorous yellowish white lesion was detected by cytoscopy at a site that appeared to be the right side of the ureteral orifice. Transurethral resection was performed on the same(More)
Premature ejaculation is a common sexual problem, as is erectile dysfunction. We evaluated silodosin, a highly selective α1A-adrenoceptor antagonist, as a new treatment option for premature ejaculation. α1-Adrenoceptor antagonists are widely used for lower urinary tract symptoms, and clinical studies on silodosin have shown excellent clinical efficacy for(More)
PURPOSE A new approach for retroperitoneoscopic radical nephrectomy is introduced. The point of our surgical method is the application of a combination of hand assistance and pure laparoscopic procedures with appropriate surgical steps via the retroperitoneal approach. In our early series we had good surgical results and we completed radical nephrectomy in(More)
To investigate the relation between testicular transferrin and insulin-like growth factor-1 (IGF-1) secreted by Sertoli cells and the differentiation of germ cells in the rat, testosterone and/or purified FSH was administered to rats medically hypophysectomized by an LH-RH agonist. Spermatogenesis was quantitatively analyzed and concentrations of(More)
PURPOSE To elucidate the factors contributing to staghorn stone formation in patients. MATERIALS AND METHODS The records of 82 patients (44 men and 38 women) with complete staghorn calculi were reviewed retrospectively for clinical presentation, metabolic disturbances and anatomical abnormalities. RESULTS There were 79 unilateral and three bilateral(More)
Primary signet-ring cell carcinoma (SRCC) of the prostate is very rare and has a poor prognosis, even when treated with aggressive therapy. We report herein a case of a 72-year-old man with prostatic SRCC. The patient had a tumor that extended directly to the rectum. Maximal androgen blockade was started and 20 months later, the patient was alive without(More)
PURPOSE To analyze clinical manifestations and endocrinological aspects of the patients who visited our hospital to be examined for partial androgen deficiency in the aging male (PADAM). MATERIALS AND METHODS Two hundred forty-three patients were evaluated. History taking and questionnaires were employed for analysis of their symptoms. Serum total(More)