TOPICS: Lipoma, adipose tissue, fibrous capsule, liposarcoma, lipoblast, fat vacuoles, atypical spindle cells, thigh, retroperitoneum, rhabdomyoma, spider cells, cardiac type, tuberous sclerosis, ventricles, murmur, open heart surgery, rhabdomyosarcoma, tadpole cells, desmin, myogenin, sarcoma botryoides