Introduction. Rectal large cell neuroendocrine carcinoma (LCNEC) is a poorly differentiated neoplasm that is very rare and belongs within the poorest prognostic subgroup among primary colorectal neoplasms. Here. we describe a case of LCNEC of the rectum. https://www.roneverhart.com/Paistinpannu-rst-kupari-o-28-cm-3-L/