Fig. 2

Histopathologic findings of MAML2 fusion-negative mucoepidermoid carcinoma (MEC). Histopathology showing the features of low-grade MEC, demonstrating cystic spaces lined by epidermoid cells, intermediate cells and mucus-producing cells (arrows) (A), Intermedia-grade MEC with oncocytic, occasional mucus-producing cells (arrows) (B), high-grade MEC showing squamous epithelioid with large nuclei, occasional gland formation or mucin production (arrows) (C), intermedia-grade MEC with a moderate degree of nuclear atypia epidermoid cells, mucous cells (arrows) and inflammatory cells infiltration (D)