_:vb50947388 "A spastic cerebral palsy that affects lower extremities resulting in tight leg and hip muscles. The legs cross at the knees, making it difficult to walk."^^ . _:vb50947388 . _:vb50947388 "url:https://rarediseases.info.nih.gov/diseases/9637/spastic-diplegia-cerebral-palsy"^^ . _:vb50947388 . _:vb50947388 . _:vb50947388 .