INTRAVASCULAR PAPILLARY ENDOTHELIAL HYPERPLASIA: A REORGANIZING THROMBUS

A 31-year-old healthy woman consulted us for an asymptomatic nodule on the volar aspect of the third finger of the left hand (Fig, 1), This lesion had appeared spontaneously 3 months prior. It was somewhat masked by the shape of the finger, but the color and the discrete dome-shaped prominence revealed it clearly; a nonpainful, but tender, nodule 8 mm in size was evident on palpation. It was reddish-blue, blanching on pressure, thus suggesting vascular origin. It was shelled out easily from adjacent tissues by surgical excision, A 7-mm bloody mass was obtained, Histopathologic examination showed a mid-sized thinwalled dilated vein completely occupied by a large thrombus with two different areas (Fig, 2), The outer part was mainly solid and hypocellular, while the inner portion was markedly cellular (Fig, 3), Several small channels and transversely sectioned papillary structures could be observed. All these findings were consistent with an intravascular papillary endothelial hyperplasia. The lesion did not recur 15 months after excision.