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Results 1 - 2 of 2 for Hyperextensibility of the knee
  1. Pseudoachondroplasia 
    ... osteoarthritis; an unusually large range of joint movement (hyperextensibility) in the hands, knees, and ankles; and a limited range of motion ...
    https://medlineplus.gov/genetics/condition/pseudoachondroplasia - Genetics
  2. Williams Syndrome From the National Institutes of Health (Genetic and Rare Diseases Information Center)  
    Genetic Disorders/Specifics ... Genetic Disorders ... Developmental Disabilities/Specifics ... Developmental Disabilities ... Genetic and Rare Diseases Information Center ...
    https://rarediseases.info.nih.gov/diseases/7891/williams-syndrome - External Health Links