Composite neuroendocrine tumor and adenocarcinoma of the rectum
Abstract Background Although adenocarcinomas showing neuroendocrine differentiation or those mixed with high-grade neuroendocrine carcinoma (NEC) are sometimes Animated encountered, composite tumors comprising neuroendocrine tumor (NET) Grade 1 and adenocarcinoma are exceedingly rare.Case presentation A 64-year-old male presented after testing posi