Hamamy syndrome

Definition:

Hamamy syndrome (HMMS) is a rare autosomal recessive syndrome comprising severe hypertelorism, brachycephaly, abnormal ears, sloping shoulders, enamel hypoplasia, and osteopenia with repeated fractures. Patients have severe myopia, mild to moderate sensori-neural hearing loss and borderline intelligence. It has been reported that mutations in IRX5 cause HMMS by repressing SDF1. SDF1 encodes a chemokine essential for cranial neural crest cell migration.

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