Fig. 2

Gross features A an 8 cm. Lesion of the left clavicle, with soft tissue invasion. Histological features of the lesion, composed of glomerulus-like structures (B), with papillary structures projecting into the lumen, covered by plump “hobnail” endothelial cells (C–E). Immunohistochemical positivity for podoplanin (D2-40) in the neoplastic cells (F)