hereditary disease soft tissue neoplasm Mazabraud syndrome https://github.com/monarch-initiative/mondo/issues/6877 https://www.malacards.org/card/mazabraud_syndrome Myxoma with fibrous dysplasia UMLS:C3697137 MONDO:0018933 Orphanet:57782 ICD9:733.29 SCTID:699251001 GARD:0018853 Mazabraud syndrome is a rare primary bone dysplasia characterized by the association of fibrous dysplasia with intramuscular myxomas. Fibrous dysplasia (usually polyostotic, sometimes monostotic) occurs during the growth period and can be asymptomatic or can present with pain, skeletal deformities or fractures while intramuscular myxoma, associated with polyostotic fibrous dysplasia is usually multifocal, typically occurring in the vicinity of skeletal lesions, and presents in adulthood as a painless soft-tissue mass (most commonly in the thigh). Although it is a benign condition, local recurrences of myxomas after incomplete excision and malignant transformation of a fibrous dysplastic lesion into osteogenic sarcoma have been reported. MEDGEN:784403 ICD9:215.9 icd11.foundation:1153435718 obsolete primary bone dysplasia with disorganized development of skeletal components