Intravascular papillary endothelial hyperplasia (Masson's tumor) of the oral mucosa. Presentation of two cases and review

Abstract

Intravascular papillary endothelial hyperplasia (Masson's tumor) is a benign lesion of the skin and subcutaneous tissue consisting of a reactive proliferation of endothelial cells with papillary formations related to a thrombus. The clinical picture is not specific and the diagnosis is based on histological examination. The lesion is often mistaken with angiosarcoma and a group of other benign and malignant vascular lesions. The presentation in the oral mucosa and lips is rare. Two new cases located in the lower lip and buccal mucosa are presented and a review in accessible literature is made.