Lenz-Majewski Hyperostotic Dwarfism

An extremely rare syndrome associating dwarfism, characteristic facial appearance, cutis laxa and progressive bone sclerosis.

Epidemiology

Nine cases have been reported in the literature.

Clinical description

Marked hypertelorism and broad forehead are noted in all patients as well as large ears. Loose and wrinkled atrophic skin with prominent veins is also apparent, giving the patient a progeroid appearance. Increasing generalized osteosclerosis of tubular bones, vertebrae and cranial bones is a characteristic feature. Cutaneous syndactyly of 2nd to 5th fingers was observed in all patients, as well as brachydactyly (see this term) and proximal symphalangism (see this term). All patients have moderate to severe intellectual deficit.

Genetic counseling

The elevated age of some patient's fathers of the reported families is suggestive of an autosomal dominant de novo mutation.