[A case of giant prostate carcinoma difficult to diagnose because of absence of urinary difficulty]

A 76-year-old man who had been suffering from bilateral leg edema and lower abdominal distension since June 2008, consulted our hospital. The computed tomography revealed a giant pelvic mass with a high value of prostate specific antigen. A transrectal prostatic biopsy was performed and the histopathological diagnosis was poorly differentiated adenocarcinoma of prostate. The clinical stage was D2 with multiple lung metastases but no bone metastasis. After 3 months of multiple androgen blockade (MAB), the multiple lung metastases disappeared. MAB is being continued.