NCIt synonyms : Anal Canal NEC G3; Anal Canal High Grade Neuroendocrine Carcinoma; Anal Neuroendocrine Carcinoma; Anal NEC; Anal NEC G3; Anal Canal NEC; Anal High Grade Neuroendocrine Carcinoma;
NCIt definition : An aggressive, high-grade, and poorly differentiated carcinoma with neuroendocrine
differentiation that arises from the anal canal. The mitotic count is more than 20
per 10 HPF. It is classified as either small or large cell neuroendocrine carcinoma
based on the size of the malignant cells, the prominence of the nucleoli, and the
amount of cytoplasm.;