There are a number of tumors of muscular origin, which overall are relatively uncommon, representing ~2% of benign soft tissue tumors and ~10% of malignant soft tissue tumors 1.
Pathology
The tumors can be divided according to the type of muscle fiber:
Skeletal muscle origin
- benign
-
rhabdomyoma
- extracardiac (non-cardiac) rhabdomyoma
- cardiac rhabdomyoma
-
rhabdomyoma
- malignant
-
rhabdomyosarcoma
- embryonal rhabdomyosarcoma subgroup
- alveolar rhabdomyosarcoma
- pleomorphic rhabdomyosarcoma
-
rhabdomyosarcoma
Smooth muscle origin
- benign
- malignant