In this report we describe the occurrence of severe mesomelic shortening of the forearms due to hypoplasia of the ulnae with severe radial bowing. In contrast to the mesomelic dysplasias, i.e. Langer type of mesomelic dwarfism, this apparently autosomal dominantly inherited skeletal anomaly occurred as an isolated anomaly without concomitant involvement of shanks or other parts of the skeleton, and did not influence final adult height.