A malignant neoplasm arising from skeletal muscle. The disease is skeletal muscle cancer (MONDO_0002847). Also known as: cancer of skeletal muscle tissue, malignant neoplasm of skeletal muscle, malignant neoplasm of skeletal muscle tissue, malignant neoplasm of the skeletal muscle, malignant skeletal muscle neoplasm, malignant skeletal muscle tissue neoplasm, malignant skeletal muscle tumor, malignant skeletal muscle tumour.