RESUMO
Ectodermal dysplasia is a hereditary disease characterized by a congenital dysplasia of one or more ectodermal structures and their accessory appendages. There are two main types, Hypohidrotic/Christ-Seimens- Tourian Syndrome and Hidrotic/Clouston syndrome. Common manifestations include defective hair follicles and eyebrows, frontal bossing with prominent supraorbital ridges, nasal bridge depression and protuberant lips. Intraorally common findings are anodontia or hypodontia and conical shaped teeth. The patient may suffer from dry skin, hyperthermia and unexplained high fever because of the deficiency of sweat glands. The present article reports unique case series of ectodermal dysplasia cases in two families, where three generations in the both the families were affected.