A case of atypical inter-muscular lipoma (Evans)

A case of a 51-year-old woman with a lipoma-like tumor on the right arm which showed rapid recurrence after the first simple excision is reported. On the second surgical operation, a lipoma-like tumor with extensive growth between the biceps muscle and brachialis muscle of the right arm was noted. Histological examination revealed almost mature fat cells and scattered atypical lipoblast-like cells. For the treatment of an atypical inter-muscular lipoma, complete excision is necessary, although very extensive treatment is not recommended.