Neuroendocrine Rectum Carcinoma. Uncommon presentation of a rare tumor

Abstract

Introduction: Neuroendocrine carcinoma of the rectum is a rare variety within colorectal tumors that represent less than 1% of them, being the third in order of frequency behind the appendicular and gastropancreatic tumors. They appear at an average age of 56 years, with a slight predominance of males.

Clinical case: A 56-year-old male patient consulted for abdominal pain in the left iliac fossa and hypogastrium associated with altered bowel habits, rectal syndrome and weight loss. Regular general condition, distended and painful abdomen.Tomography demonstrates the presence of circumferential parietal thickening of the rectosigmoid junction, edema, and paracolic adenopathies. Emergency laparotomy, low anterior resection, and terminal ileostomy are performed. Pathology indicates large cell neuroendocrine carcinoma. pT4-N1-Mx

Conclusion: A rare case of rectal neuroendocrine carcinoma is presented. The presentation of the tumor in this clinical case is infrequent and in advanced form.