Members of this family have shortened metacarpals
and metatarsals IV and V. Broadened thumbs were described in some members,
as well as dysplastic fingernails (grooved and koilonychia-like) on the
affected fingers and toes. In 1951, Julia Bell classified the
brachydactylies in five main groups (A-E). This present form of
brachydactyly combines the features of type B and E. Type B involves index
to little fingers and is characterized by a symmetrical deformity with
hypoplasia or absence of the distal phalanges with absence or dysplasia of
the affected nails. Changes on the ulnar side are more pronounced than
changes on the radial side. In type E, one or more metacarpals are
shortened, either with or without shortening of the metatarsals.