title: [A case of prostate cancer presenting as extensive abdominal metastasis].
abstract: A 73-year-old man was admitted to our hospital with a chief complaint of hematemesis. Two years before admission, adenocarcinoma of unknown origin was diagnosed. Since then, the patient had been taking TS-1 (pramoxine hydrochloride) medication, which caused gastroduodenal mucosal damage. A large abdominal tumor and elevated prostate specific antigen (PSA) level of 13,190 ng/ml, caused by this damage, were detected. Extensive abdominal metastasis of prostate cancer was diagnosed and combined androgen blockade was initiated. After 3 months, the PSA level decreased to 4.4 ng/ml and the abdominal tumor shrunk significantly. Physicians should keep in mind prostate cancer in the differential diagnosis of unexplained adenocarcinoma.
authors: The Department of Urology, Kariwagun General Hospital.
authors: Yuko
authors: Y
authors: Shirono
authors: Shugo
authors: S
authors: Hanyu
authors: Toshihiko
authors: T
authors: Ikarashi
mesh_terms: D000008:Abdominal Neoplasms / Q000556:secondary*; D000368:Aged; D006801:Humans; D008297:Male; D017430:Prostate-Specific Antigen / Q000097:blood; D011471:Prostatic Neoplasms / Q000175:diagnosis / Q000473:pathology*
chemical_list: D017430:Prostate-Specific Antigen