Vascular hamartoma of the paranasal sinuses: report of 3 rare cases and a short review of the literature - page 2 | Ear, Nose & Throat Journal
All 3 tumors described herein are unusual in the sense that they were microscopically characterized by the presence of widely spaced, variously sized, blood-filled vascular channels embedded in a connective tissue stroma that varied from loose fibroadipose tissue (patient 1) to dense fibroblastic tissue (patients 2 and 3). These morphologic features are consistent with the designation of vascular hamartoma. Morphologically, hemangiomas bear a close resemblance to vascular hamartomas, and it is often difficult to distinguish the two. However, unlike the histology seen in these 3 cases, most of the hemangiomas that have been reported in the sinonasal region were either classic capillary hemangiomas, cavernous hemangiomas, or ossifying angiomas.