Papillary intralymphatic angioendothelioma

Definition

A rare vascular tumor characterized by an ill-defined, slowly growing, asymptomatic cutaneous plaque or nodule mostly involving the limbs, in fewer cases the trunk. The tumor is composed of lymphatic-like channels with prominent intraluminal papillary tufts with hyaline cores lined by hobnail endothelial cells. It is locally aggressive, while metastasis is rare. Infants and children are much more often affected than adults.