Intravenous pyogenic granuloma: immunohistochemical consideration--a case report.

Intravenous pyogenic granuloma is a rare form of pyogenic granuloma in which the whole lesion appears as a single polypoid mass projecting into the lumen of a vein. Histologically, this benign lesion is similar to pyogenic granuloma of other locations and is characterized by lobular proliferation of capillaries embedded in a fibromyxoid stroma. The following report illustrated the classic findings associated with an intravenous pyogenic granuloma in a young woman. A brief review of this rare entity follows the case report. Although the history and physical findings were approximately the same in each patient, they do not seem characteristic enough to allow for a definite preoperative diagnosis. The clinical differential diagnosis of intravenous pyogenic granuloma is varied and requires careful pathologic attention if excised. Complete local excision with a small portion of the vein is the treatment of choice.