Ectopic Prostatic Tissue in the Rectum: A Case Report

Ectopic prostatic tissue at the rectum presenting as a submucosal tumor: A case report

“…In the present case, EUS was arranged for examination because of the highly suspected subepithelial lesion, which is thought to be a powerful evaluating and less invasive tool for colorectal diseases [13] . The image findings revealed a rectal subepithelial hypoechoic mass involving the muscularis propria layer, three separated Reviewing the characteristics of EPT radiographic findings, it was found similar to the image exam results of a previous study [6] ,…”

“…to elucidate this pathological phenomenon. In differentiation, but none of these theories have been certainly confirmed [6][7][8] .…”

“…Cases of EPT outside the urinary tract are few, which are hard to be preoperatively distinguished and diagnosed using image exams, such as colonoscopy or computed tomography. Magnetic resonance imaging (MRI) is considered more sensitive to detect EPT, but a further histologic report is still necessary for diagnosis [6] . When EPT is encountered, prostate-specific antigen (PSA) and prostatespecific acid phosphatase (PSAP) are the most immunohistochemical stains to be used [9] , and P501S can also be used for detecting prostatic tissue if the above stains are inconclusive [10] .…”

“…The tissue of the prostate gland is divided into reported that 80% of ETP in the urogenital tract showed the presence of papillary and cribriforming prostatic acini, which is related to the central zone [9] , and there are also some cases related to the peripheral zone [6] .…”