Neuroendocrine Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** An aggressive carcinoma composed of malignant cells that exhibit neuroendocrine differentiation. It is classified as small cell or large cell neuroendocrine carcinoma.

**Synonyms:** - High-Grade Neuroendocrine Carcinoma - Malignant Poorly Differentiated Epithelial Neuroendocrine Neoplasm - Malignant poorly differentiated neuroendocrine tumors - NEC - Neuroendocrine Cancer - Neuroendocrine Cancer - Neuroendocrine cancer, NOS - Neuroendocrine carcinoma, NOS - Poorly Differentiated Epithelial Neuroendocrine Neoplasm