= HAJDU-CHENEY SYNDROME

= rare bizarre entity of unknown etiology

Location: may be unilateral

• fingernails remain intact; sensory changes + plantar ulcers rare
• pseudoclubbing of fingers + toes with osteolysis of terminal + more proximal phalanges
• genu varum / valgum
• hypoplasia of proximal end of radius
• subluxation of radial head
• scaphocephaly, basilar impression
• wide sutures, persistent metopic suture, wormian bones, poorly developed sinuses
• kyphoscoliosis
• severe osteoporosis + fractures at multiple sites (esp. of spine)
• protrusio acetabuli