Primary extrasensal nasal-type natural killer/T-cell lymphoma of the sigmoid colon and ıleocecal junction: A case report.

Extranodal natural killer/T-cell lymphoma (ENKTL) involving the intestinal tract is a rare disease. A total of 191 cases of ENKTL involving the gastrointestinal (GI) tract have been reported in the world literature, with a maximum age of onset of 79 years. Among them, 5 cases were involved in the sigmoid colon. Here, we reported the case of an 82-year-old ENKTL patient with sigmoid colon and ileocecal junction involvement, who had achieved a partial response after treatment with chidamide and prednisone.