Pili trianguli et canaliculi: a case report describing the association of uncombable hair with atopic dermatitis and tooth anomalies

We report on a child with pill trianguli et canaliculi. This hair shaft abn ormality belongs to a heterogeneous group of diseases which are included un der the synonym uncombable hair. The diagnosis was confirmed by scanning el ectron microscopy, revealing hair shafts with a characteristic longitudinal groove. In addition the girl suffered from atopic eczema and tooth anomali es. Our findings suggest that this disorder could represent a tricho-odonta l subtype of ectodermal dysplasia.