disease arises from structure disease arises from alteration in structure muscle cell mesenchymal cell neoplasm muscle tissue disorder neoplasm myomatous neoplasm MEDGEN:76477 A benign or malignant mesenchymal neoplasm arising from smooth, skeletal, or cardiac muscle. myofibroblastoma MONDO:0021545 muscle neoplasm muscle tissue neoplasm MESH:D009379 muscle tumor tumour of muscle neoplasm, muscle tissue myofibroblastomas tumor of the muscle neoplasm of muscle myoblastoma neoplasm of the muscle myomatous tumour tumor of muscle MESH:D019042 muscle tissue neoplasms NCIT:C4063 tumour of the muscle UMLS:C0282606 muscle tumour myoblastomas myomatous neoplasm myomatous tumor