case_images: PMC2815844_01
case_images: Arthrogryposis affecting the hips and knees. The baby had fixed hyperextended knees and fixed flexed hips. The trunk and upper extremities were not involved.
case_images: ymj-46-567-g001.jpg
case_images: PMC2815844_01_ymj-46-567-g001.jpg
case_images: F1
case_images: A physical examination upon admission demonstrated the following cylindrical contractures involving the lower extremities (Fig. 1, 2): (1) knees were fixed symmetrically in the hyperextended position with a range of motion (ROM) of 0 ; (2) hips were fixed in the flexed position by nearly 90  and limited in abduction with a ROM of 0-45 , and (3) thin subcutaneous tissues and absence of skin creases of the lower extremities.
case_images: Featureless lower extremities that are cylindrical with thin subcutaneous tissue and lack skin creases.
case_images: ymj-46-567-g002.jpg
case_images: PMC2815844_01_ymj-46-567-g002.jpg
case_images: F2
case_images: A physical examination upon admission demonstrated the following cylindrical contractures involving the lower extremities (Fig. 1, 2): (1) knees were fixed symmetrically in the hyperextended position with a range of motion (ROM) of 0 ; (2) hips were fixed in the flexed position by nearly 90  and limited in abduction with a ROM of 0-45 , and (3) thin subcutaneous tissues and absence of skin creases of the lower extremities.