Transformed EGFR-Positive Lung Non-Small Cell Carcinoma to Small Cell Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** Histologic transformation of EGFR mutation-positive lung non-small cell carcinoma to small cell carcinoma, following treatment with tyrosine kinase inhibitors.

**Synonyms:** - Transformed EGFR-Positive Lung Non-Small Cell Carcinoma to Lung Small Cell Carcinoma