Fig. 2

a H&E staining (×10): numerous neoplastic vascular channels (left) that infiltrates the renal parenchyma (right). b H&E staining (×20): neoplastic cells forming vascular structures with epithelioid features and highly atypical nuclei. c H&E staining (×10): malignant cells of angiosarcoma (left) juxtaposed to benign spindle cells population of schwannoma (right). d H&E staining (×40): fine needle aspiration biopsy of the pulmonary lesion shows neoplastic cells