Ectodermal Dysplasia, X-Linked (Shepherd Type) is an inherited disease affecting dogs. This disease most commonly presents at birth. Affected dogs are born with symmetrical hairlessness on the forehead and the area over the lower back. Malformed and/or absent teeth (oligodontia) are also a feature of the disorder. Dogs may also have an inability to sweat (anhidrosis) due to missing or abnormal sweat glands. Tear production can be abnormal and dogs often develop dry eye (keratoconjuncitivitis sicca). Affected dogs are more prone to respiratory infections than other dogs and frequently have chronic nasal discharge. Prognosis for survival to adulthood is good. However, affected dogs should be monitored for signs of respiratory infections (cough, rapid or difficult breathing, and exercise intolerance) as they are sometimes fatal.