Rectal Invasion by Metastatic Prostate Adenocarcinoma.

In men, prostate cancer is the second most diagnosed cancer worldwide. Typical sites for metastasis include bone, lung, and liver. Prostate cancer with gastrointestinal involvement, particularly rectal, has been rarely reported in the literature. As patients with prostate cancer with rectal invasion may present with symptoms similar to those of other gastrointestinal pathologies, such as anal fissures and rectal carcinoma itself, misdiagnosis and delays in care can result. Direct visualization of the rectum via endoscopy, along with biopsy, allows clinicians to make an accurate and timely diagnosis in patients with prostate cancer with rectal involvement, which in turn leads to broader available treatment options.