disease arises from structure muscle cell mesenchymal cell neoplasm muscle tissue disease neoplasm (disease) myomatous neoplasm A benign or malignant mesenchymal neoplasm arising from smooth, skeletal, or cardiac muscle. MESH:D009379 MESH:D019042 MONDO:0021545 NCIT:C4063 muscle neoplasm muscle tissue neoplasm muscle tissue neoplasms muscle tumor myoblastoma myoblastomas myofibroblastoma myofibroblastomas myomatous neoplasm myomatous tumor neoplasm of muscle neoplasm of the muscle neoplasm, muscle tissue tumor of muscle tumor of the muscle