Characteristic craniofacial appearance and brachytelephalangy in a mother and son with Kallman syndrome in the son.

We report on a mother and son with a similar facies characterized by a square forehead, small nose, telecanthus, and thin upper lip. They both had a similar metacarpal-phalangeal profile characterized by marked brachytelephalangy. They were both short in comparison to other family members, and the son had hypogonadotropic-hypogonadism and anosmia. We favor the hypothesis of a single autosomal dominant gene with variable expression of the hypogonadism and anosmia, although there are alternative explanations for the combination.