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Updated: Aug 20, 2026

Establishment and Characterization of Small Bowel Neuroendocrine Tumor Spheroids
Published on: October 14, 2019
Multiple endocrine neoplasia type 2 syndrome presenting with bowel obstruction caused by intestinal neuroma: case
Maitreyi Prabhu1, Rami N Khouzam, Jonathan Insel
1Tucson Hospitals Medical Education Program, University of Arizona, Tucson, AZ, USA.
Abstract:
We present the case of a 23-year-old male with a history since early childhood of lip and tongue mucosal neuromas. At the age of 19, he was diagnosed with both medullary thyroid carcinoma and pheochromocytoma within 1 year. These findings, with his marfanoid habitus, led to the diagnosis of multiple endocrine neoplasia type 2 (MEN 2B) syndrome. This was confirmed by a positive RET proto-oncogene. On this admission, he presented with an intestinal obstruction. Abdominal exploration revealed an obstructing tumor mass requiring colectomy, which proved by biopsy to be an intestinal neuroma. This report presents a unique case of a colonic mucosal neuroma causing obstruction in MEN 2B syndrome after the diagnosis of medullary thyroid carcinoma.
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