Fig. 2: Histopathologic and immunhistochemical features of INI1 (SMARCB1) -deficient thoracic neoplasm.

Epithelioid tumor cells with abundant eosinophilic cytoplasm and enlarged vesicular nuclei with prominent nucleoli (patient 1, 2, 5, 7). Rhabdoid morphology with hyaline cytoplasmic inclusions (patient 3, 4). Mixed morphology with discohesive- rhabdoid and discohesive epithelioid components (patient 6, 9). Solid tumor with cell-to-cell cohesion is evident in patient 8. Localization: pleural (yellow), intrapulmonary (green), mediastinal (purple), thoracic wall (pink). Magnification 400x.