Tumors of fibroblasts and muscle cells.
D005350:Fibroma / Q000648:ultrastructure*; D006801:Humans; D007890:Leiomyosarcoma / Q000648:ultrastructure; D009214:Myoma / Q000648:ultrastructure*; D009217:Myosarcoma / Q000648:ultrastructure; D012207:Rhabdomyoma / Q000648:ultrastructure