2021 Volume 63 Issue 9 Pages 1623-1629
A 58-year-old woman presented to our hospital due to bleeding during bowel movements for approximately 5 years. Lower gastrointestinal endoscopy revealed a 40-mm, slightly uneven, yellowish, ridge-like lesion that rose steeply from the lower Huston valve. The raised surface was covered with a nontumor mucosa that showed an ulcerated surface. Biopsies from the ulcer margin resulted in the diagnosis of a neuroendocrine tumor (NET). Abdominal computed tomography revealed lateral lymphadenopathy and a calcified liver tumor. We diagnosed the lymphadenopathy and liver tumor to be metastatic from the rectal NET and resected the rectal and liver tumors along with the enlarged lymph nodes during a two-stage surgery. All the resected tissues were pathologically diagnosed as G1 NET. We describe this rare case of G1 NET progressing to a large tumor, with lymphadenopathy and liver metastasis.
