Osteoporosis-macrocephaly-blindness-joint hyperlaxity syndrome is characterised by osteoporosis, macrocephalus, brachytelephalangy, and hyperextensibility of the joints. Congenital amaurosis and intellectual deficit have also been reported. This syndrome has been described in three members of one family.

Short distance from the end of the finger to the most distal interphalangeal crease or the distal interphalangeal joint flexion point. That is, hypoplasia of one or more of the distal phalanx of finger.