GAPO syndrome
    
        
        
            
        
        Growth retardation-alopecia-pseudoanodontia-optic atrophy (GAPO) syndrome is a form of ectodermal dysplasia, one of a group of syndromes deriving from abnormalities of the ectodermal structures, which include the hair, teeth, nails, sweat glands, cranial-facial... 
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