Two children with progressive facial atrophia are described. In both asymmetria of the face was the reason for neuropediatric examination. Discrete neurological symptoms of this neurocutaneous syndrome were found. In patient 1 atrophia of one side of the face had developed shortly after surgical treatment of a mandibular exostose on the other side of the face. In patient 2 first signs of hemifacial atrophia were found in the newborn. Both children showed only discrete neurological symptoms. Etiology of this rare disease is still unknown, causal treatment is not possible.