Lung Non-Small Cell Carcinoma, Not Otherwise Specified

**Semantic type:** Neoplastic Process

**Definition:** A term that is only used for lung cytopathological specimens and small biopsies in which there are features of poorly differentiated carcinoma present, but there is no morphological and immunocytochemical evidence of adenocarcinoma or squamous cell carcinoma differentiation.

**Synonyms:** - Lung Non-Small Cell Carcinoma, NOS - NSCC-NOS