Symptoms include gingival fibromatosis, associated with hypoplasia of the distal phalanges, nail dysplasia, joint hypermobility, and sometimes hepatosplenomegaly. The nose and pinnae are usually large and poorly developed, which gives the individuals with the syndrome abnormal facial characteristics. Mental retardation may also occur. Both males and females are equally affected. Gingival fibromatosis is usually present at birth or appears short after. The term<unk><unk>  was coined by Carl Jacob Witkop in 1971.
Zimmermann–Laband syndrome
Andermann syndrome
Binder's syndrome
Keppen–Lubinsky syndrome
Wissler's syndrome
Scheuermann's disease
Lenz–Majewski syndrome
Wildervanck syndrome