Epithelioid Mesothelioma

**Semantic type:** Neoplastic Process

**Definition:** A malignant neoplasm arising from mesothelial cells. It is characterized by the presence of cells with epithelioid morphology. The epithelioid cells usually have eosinophilic cytoplasm, bland nuclei, and form tubulopapillary, microglandular, or sheet-like patterns.

**Synonyms:** - Epithelial Mesothelioma - Epithelioid mesothelioma, NOS - Epithelioid mesothelioma, malignant - Malignant Epithelial Mesothelioma