Incidental Detection of Neuroendocrine Carcinoma of Rectum D
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Neuroendocrine tumors of the rectum account for approximately 19% of gastrointestinal neuroendocrine tumors. The vast majority of tumors are asymptomatic and detected incidentally during colonoscopy or endoscopy. In general, NETs arise from the amine precursor uptake and decarboxylation cells. These tumors are most commonly found in the gastrointestinal tract and are located in decreasing order of frequency in the ileum, rectum, appendix, stomach, duodenum and jejunum and colon. In this case report, we present our experience in a patient who came for diagnostic workup of renal cell carcinoma and a rectal mass was detected incidentally during CT imaging which turned out to be a neuroendocrine carcinoma on histopathologic examination.

Case Report
A 57-year-old male came with complaints of left loin pain and hematuria for the past 5 days, without other significant history. On physical examination, a mass was palpable on the left lumbar region. USG of the abdomen showed a solid mass lesion with internal vascularity seen involving the left kidney. Contrast-enhanced computed tomography of abdomen was done for further evaluation. CECT of the abdomen showed a well-defined heterogeneous soft tissue mass lesion with a tiny speck of calcification involving the interpolar region of the left kidney. The lesion was seen extending into the perinephric space and abutting the perinephric fascia seen. No extension beyond the fascia was seen. No extension into the main renal vein was seen. No lymphadenopathy was seen.....