A 65-year-old man presented to our hospital with a chief complaint of
abdominal pain during defecation. Abdominal contrast-enhanced CT showed circumferential wall thickening with contrast effects in the sigmoid colon, and multiple
metastases in the liver. Colonoscopy revealed a type 2 colon
tumor that was obstructing the passage. A diagnosis of
sigmoid colon cancer and multiple liver
metastases was made based on laparoscopic sigmoidectomy plus D3 dissection. Pathologically, the resected specimen was diagnosed as colorectal neuroendocrine cell
carcinoma(NEC)that was positive for
synaptophysin and CD56. Postoperatively, 8 courses of FOLFOX plus
bevacizumab(BV)
therapy were administered, but CT showed remarkable increase in liver
metastasis, and he died 5 months after the operation. Colorectal NEC is a very
rare disease, for which no
chemotherapy has been shown to be effective. Since we encounterd a case of sigmoid colon NEC with multiple liver
metastases that followed a rapid course, we have presented it along with a literature review.