disease has location bone disease chondromalacia patellae disease_ontology Chondromalacia of patella ICD10CM:M22.4 MESH:D046789 MIM:168900 A chondromalacia that is characterized by well-localized pain when the patella is grated against the femoral condyles or when the knee is actively extended with the patella manually displaced distally. This occurs when the posterior articular surface of the patella starts losing its density when in a healthy state and becomes softer with subsequent tearing, fissuring, and erosion of the hyaline cartilage. ICD9CM:717.7 SNOMEDCT_US_2025_09_01:156521009 DOID:13357 OMIM mapping confirmed by DO. [SN]. UMLS_CUI:C0008475 softening of articular cartilage of patella chondromalacia hyaline cartilage tissue patella