[Christ-Siemens-Touraine syndrome. A new case].

A patient with anhidrotic ectodermal dysplasia presented the three classical symptoms necessary to establish an early diagnosis: hypotrichosis, absence or reduction in number of teeth, and absence or diminution of sweat glands. Radiological examination of the maxillary bones (particularly a panoramic image) and skin biopsy provided confirmation of diagnosis. The course of Christ-Siemens syndrome is dominated by the extent of the thermal disorders during the first three months of life, and the functional and psychological disturbances related to the absence of the teeth and to the "appearance" of the patient.