[Monilethrix: exclusive involvement of body hair].

In a family suffering from monilethrix, at first sight only one generation seemed to be affected, suggesting a recessive mode of inheritance. A thorough examination of the scalp and body hair of all family members, however, revealed three other affected persons in two more generations proving autosomal dominant transmission. We consider this observation an additional argument against the existence of a recessive type of monilethrix which has been postulated in the past.