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Classification and external resources
ICD-O: M8895/3
MeSH D009217

Myosarcoma is a malignant muscle tumor.[1]

Leiomyosarcoma refers to sarcoma of smooth muscle, and rhabdomyosarcoma refers to sarcoma of striated muscle. However, the term myosarcoma itself still appears in the literature. People who suffer from myosarcoma often wake up with the feeling as if they had a cramp during their sleep.[2]