Infiltrating lipomas and angiolipomas revisited

Abstract

Twenty-seven soft tissue tumors composed of benign adipose tissue are presented featuring extensive local invasion and recurrence. Infiltrating angiolipomas and infiltrating lipomas are two distinct entities with different clinical and histologic features. The surgical approach demands wide local excision assisted by frozen section analysis to assure adequacy of removal. Extensive histologic sampling is mandatory to demonstrate the infiltrative character of the tumor and yet eliminate from consideration liposarcoma with which it may be confused. Although locally recurrent, neither has yet undergone malignant transformation.