Fig. 1From: Heart rupture repair during huge mediastinal mass resection – case reportMicroscopic images of the resected thymoma. a; there is proliferation of squamoid cells with vesicular nuclei and prominent nucleoli. Scattered lymphocytes are seen admixed with the epithelial cells (H&E X40). b; the lymphocytes show positive nuclear stain for TdT (X40). Both features are supportive of the diagnosis of thymoma, B3 variant Back to article page