Advanced prostate cancer discovered with cancerous peritonit
Cancerous peritonitis occurs rarely in patients with prostate cancer since prostate cancer is not likely to cause peritoneal dissemination because of the localization of prostate itself and the low frequency of metastasis to the intraperitoneal organs from prostate cancer.

This rarity of cancerous peritonitis may delay the diagnosis and treatment of prostate cancer.

Published in Urology Case Reports, the authors present a case of a patient with abdominal distension due to cancerous peritonitis wherein the primary tumor in the intraperitoneal organs could not be detected, but prostate cancer was diagnosed by the presence of adenocarcinoma cells using ascites puncture cytology.

A 68-year-old man presented with abdominal distension and edema of the scrotum. Computed tomography (CT) findings showed prominent ascites and mesenteric thickening. Since adenocarcinoma cells were detected from ascites puncture cytology, we suspected the patient of having gastrointestinal cancer and performed endoscopy. However, the lesion could not be identified. The ascitic fluid repeatedly flared, even after puncture drainage.

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