Torsion of the femur.
D001848:Bone Diseases, Developmental / Q000209:etiology; D002648:Child; D002675:Child, Preschool; D005269:Femur; D006617:Hip Dislocation / Q000150:complications*; D006618:Hip Dislocation, Congenital / Q000150:complications*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn