Intravascular papillary endothelial hyperplasia of the finger: a case of Masson's tumor

Abstract

Intravascular papillary endothelial hyperplasia is an uncommon benign vascular lesion characterized by a reactive proliferation of endothelial cells. The lesion of the finger often presents diagnostic challenges to surgeons because of its rarity. We report a case of intravascular papillary endothelial hyperplasia to facilitate the recognition of this uncommon lesion.

Keywords: Blood vessels; cysts; endothelium; fingers; hyperplasia.

Figure 1.

Preoperative ultrasonography reveals about 0.7 × 0.3 × 1.2 cm sized cystic lesion with no remarkable increased vascularity.

Figure 2.

Intraoperative photograph shows a soft, red purple, and well-circumscribed cystic mass looking like a hemangioma at the volar surface of left 2nd proximal phalanx.

Figure 3.

Histopathologic appearance of the lesion. (a) The specimen showed intravascular proliferative lesion with organizing thrombus (arrow) (H&E, ×15). (b) High magnification of papillary proliferations revealed fibrinous and hyaline stalks lined by endothelial cells (H&E, ×400). (c) These lining cells were positive for anti-CD31 (immunohistochemical stain, clone JC70, Cell Marque, ×100).