Solitary angiokeratoma of the tonsillar pillar of the oral cavity.

Solitary angiokeratoma has rarely been described in oral mucosa, mainly in the tongue, where the main concern is either aesthetical or due to bleeding problems. We present a case of solitary angiokeratoma of the tonsillar pillar in a 68-year-old man. Histologically, the morphology was typical of angiokeratoma. It showed an immunohistochemical pattern in consonance with a blood vessel origin, with expression of CD31, CD34, and von Willebrand factor. The lesion did not express D2-40. No other malformation or metabolic disorder was found in the patient. The lesion was surgically removed and due to the disproportionate post-surgery bleeding, the patient was studied by the Hematology Service, and she was diagnosed as an inhibitor of Factor VIII carrier.