label: Digestive System Small Cell Neuroendocrine Carcinoma
label_lc: digestive system small cell neuroendocrine carcinoma
description: An aggressive high-grade carcinoma with neuroendocrine differentiation that arises from the digestive system and is composed of malignant small cells. The mitotic count is more than 20 per 2 mm2 and/or the Ki-67 index is more than 20% (often more than 70%).