Intravascular papillary endothelial hyperplasia of the lung.

Intravascular papillary endothelial hyperplasia (IPEH) is a benign vascular endothelial proliferation, which is usually confined to the lumen of preexisting vessels or vascular malformation. IPEH usually presents as a single lesion, and it rarely involves the lung. We describe a rare case of intrapulmonary IPEH presented by multiple variably sized, well-defined nodules occurring in a 52-year-old woman.