Intravascular papillary endothelial hyperplasia occurring in the foot: A case report and review of literature

RATIONALE: Intravascular papillary endothelial hyperplasia (IPEH; Masson tumor) is a type of vascular lesions composed of reactive proliferation of endothelial cells that occur in organizing thrombus. It commonly occurs on the head, neck, trunk, and upper extremities, but rarely in the foot. PATIENT CONCERNS: A 38-year-old woman visited the hospital with a mass on the dorsum of right foot, which gradually increased in size 3 months ago. DIAGNOSES: Ultrasonographic examination suggested angiomyolipoma or hemangioma. INTERVENTIONS: The patient underwent excision under local anesthesia. OUTCOMES: The lesion was confirmed to be IPEH by histological examination. There were no complications or recurrences after successful surgical excision. LESSONS: IPEH presenting on the dorsum of the foot is vary uncommon. Radiologic diagnosis may be limited for diagnosis, and histologic confirmation should be made after surgical excision. There are some reports suggesting an association between trauma and IPEH occurrence, but this is not yet conclusive.