Fig. 5
From: Kaposi sarcoma herpesvirus (KSHV) inflammatory cytokine syndrome (KICS): a case study
A micrograph (100x magnification) showing the presence of irregularly shaped ectatic vascular channels which dissect into dermal collagen (black arrow). Within some of these neoplastic vascular channels are entrapped native vessels (red arrow), a histologic feature known as promontory sign and is classic to Kaposi sarcoma