Nodular Kaposi sarcoma.A. The dermis is expanded by a solid tumor nodule (H&E stain). B. Fascicles of relatively monomorphic spindled cells, with slit-like vascular channels containing erythrocytes (H&E stain). C. The nuclei of the tumor cells demonstrate immunoreactivity for HHV-8 (LNA-1 immunohistochemical stain).
Grayson and Pantanowitz Diagnostic Pathology 2008 3:31 doi:10.1186/1746-1596-3-31