A brain sarcoma that is composed of malignant pleomorphic or spindle neoplastic cells typically demonstrating myogenic and/or chondroid differentiation. Cytoplasmic eosinophilic globules and myxoid stroma formation are usually present. It is associated with mutations in the DICER1 gene. The disease is MONDO_0858967 (primary intracranial sarcoma, DICER1-mutant).