[Intravascular papillary hemangioendothelioma. 4 case reports with oral localization]

The authors report four cases of papillary intravascular haemangioendothelioma of P. Masson located on the mucosa of the cheek, lip or tongue. They always presented as a painless submucosal blueish nodule, more or less elevated and firm, appearing as a thrombosed angioma. As a rule, the size was less than one centimeter. Pathological examination shows an angiomatous papillary neoformation, enclosed within a swollen veinous cavity. Diagnosis is easy on an operative specimen. However, on a small biopsy specimen, a capillary angioma, or a malignant haemangioendothelioma may be more difficult to eliminate. Surgical removal, even partial, will allow complete healing.