Retiform hemangioendothelioma is a vascular tumor of intermediate malignancy. In general, it is a slow-growing single exophytic nodular or plaque-like lesion. We present a 17-year-old male patient with a rapidly growing multifocal retiform hemangioendothelioma on his right ulno-dorsal forearm. After first excision, within 4 weeks the tumor showed local recurrence. Treatment was made by wide excision with a 1-cm margin and fascia and closure of the defect by split-thickness skin graft. Two months later, a new lesion was observed on the back of the patient's hand. After excision and wound closure with split-thickness skin grafting, there was no recurrence in a 2-year follow-up period. We discuss diagnosis, prognosis, and possible surgical treatment of this rare skin neoplasm.