Alveolar soft-part sarcoma: Case demonstrating principles for uncommon vascular lesions.

Familiarity with common vascular tumors and malformations allows providers to diagnose the majority of these lesions on a combination of clinical history and physical examination. Atypical and combined lesions do benefit from imaging to help characterize and aid in the differential diagnosis. Biopsy enables definitive diagnosis but is necessary in the minority of cases. When in doubt, referral to a specialized, multidisciplinary vascular anomalies clinic will ensure that these patients receive management for this challenging collection of conditions.