A rare genetic subcutaneous tissue disorder with the presence of benign usually multiple subcutaneous tumors. The tumors are composed of adipose tissue and blood vessels typically manifesting as yellow firm circumscribed 1-4 cm in diameter tumors located in the arms, legs and trunk with deep extension of the lesions between muscles, tendons and joint capsules (without infiltration of these structures) in several members of a single family. Tumors may be tender or mildly painful when palpated and do not regress spontaneously.