Arteriovenous hemangioma (arteriovenous shunt). A clinicopathological and histochemical study

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Abstract
Sixty‐nine patients with predominantly asymplomatic solitary angiomatous lesions were studied. Lips and perioral skin were the usual location, and the lesion occurred almost exclusively in adults. The essential histopathologic features are multiple dilated vascular channels located in the corium or submucosa and without significant epidermal participation. Anastomosing vascular spaces are lined by endothelial cells and thin‐walled veins contrast sharply with arteries showing thick fibromuscular walls. The pathogenesis of these peculiar hemangiomas is unknown, but they probably represent hamartomas with numerous arteriovenous shunts and arise from the subpapillary vascular plexus. Simple surgical excision is curative and represents the treatment of choice. The term of arteriovenous hemangioma is proposed for this clinicopathologic entity and should be considered in the differential diagnosis of other acquired benign hemangiomas and vascular lesions occurring in middle‐aged patients.

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