Yoshikazu Hasegawa

Publications (3)1.75 Total impact

• Article: [Bilateral giant scrotal hydrocele in an adult].

  Naruyasu Masue, Yoshikazu Hasegawa
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  ABSTRACT: Bilateral giant hydrocele in an adult is a rare clinical entity. A 31-year-old man presented with painless bilateral scrotal swelling that had appeared at age 13 years and had increased very slowly since. Computed tomography and ultrasonography revealed collection of fluid on both sides of the scrotum. Giant scrotal hydrocele were diagnosed, and surgical excision was performed. The fluid volume was 1,050 ml in right, 645 ml in left. No inguinal hernia was found. Pathologic examination of the resected portion of the tunica vaginalis testis revealed inflammatory changes, and fluid cytology was negative. Eight months has passed, and there has been no evidence of recurrence.
  Hinyokika kiyo. Acta urologica Japonica 08/2008; 54(7):509-11.
• Article: [Giant prostate carcinoma treated effectively with endocrine therapy: case report].

  Naruyasu Masue, Yoshikazu Hasegawa
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  ABSTRACT: An 87-year-old man visited our hospital, complaining of abdominal distention and inability to urinate. Computed tomography (CT) and magnetic resonance imaging revealed a giant prostate tumor. The patient underwent percutaneous tumor biopsies. The histologic diagnosis was moderately differentiated adenocarcinoma of prostate. The clinical stage according to the TNM classification system was T4N0M0, stage IV. Combined androgen blockade therapy was performed. Four months later, CT showed that the tumor had decreased markedly in size, and the serum prostate specific antigen level was within normal range. Hormone refractory prostate cancer was not found 1 year after the start of treatment.
  Hinyokika kiyo. Acta urologica Japonica 03/2007; 53(2):133-5.
• Article: Spontaneous disappearance of multiple lung metastases after nephroureterectomy from sarcomatoid carcinoma of the renal pelvis: a case report.

  Naruyasu Masue, Yoshikazu Hasegawa, Yohji Moriyama, Yohko Ikeda, Takahiro Gotoh, Takashi Deguchi
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  ABSTRACT: We report a case in which lung metastases disappeared spontaneously after nephroureterectomy from sarcomatoid carcinoma of the renal pelvis. A 58-year-old man presented with gross hematuria. Computed tomography (CT) revealed a left renal tumor and multiple lung metastases. Intravenous pyelography revealed a filling defect in the upper renal calyx. Urine cytology was positive. Left renal pelvic cancer was diagnosed and nephroureterectomy performed. The resected specimen was diagnosed pathologically as sarcomatoid carcinoma of the renal pelvis. Approximately 5 months later, CT revealed that the lung metastases had disappeared. There has been no evidence of disease for 46 months postoperatively.
  International Journal of Urology 02/2007; 14(1):75-8. · 1.75 Impact Factor