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.

A case of subfascial lipoma in the lateral space of neck: US and CT findings

“…It is also reported that the intramuscular location of a lipoma is a risk factor for malignancy [1]. In our patient the lesion non infiltrated the muscle planes, but was strictly adhesed to the muscular fascia [3].…”

Management of giant intermuscular lipoma of hips: A case report and review of literature

“…Moreover, despite a proven negative imaging, a liposarcoma may still be malignant. Therefore, careful histopathologic evaluation is required, and the presence of nuclear pleomorphism and multinuclear giant cells may help to distinguish lipomas from malignant liposarcomas (18).…”

Intramuscular lipoma of the tongue: Report of a case complicated with diffuse lipomatosis

“…The local recurrence rate of IML has been reported to range from 19 to 62.5%, and the time between surgery and lesion reappearance has been reported to be an average of 6 to 7.5 years [2,32]. No malignant changes have been reported for recurrent IMLs [32].…”

“…It occurs in less than 2% of all lipomas [2] and is extremely rare in oral and maxillofacial regions [3,4]. Since a local recurrence rate ranging from 19% to 62.5% after surgical excision has been reported in some literature [2,5], wide local excision and appropriate clinical monitoring of patients are mandatory [5].…”