X-rays of limb defects in patients. (Left) Foot x-ray of subject III-1, showing absence of the right foot; the calcaneus and astragalus, that are absent in the father, are present although smaller than the controlateral ones. (Right) X-ray of right hand in subject III-3, showing absence of the last phalange of 2° digit and last 2 phalanges of 3° to 5° digits.