Progressive hemifacial atrophy
, or Parry-Romberg syndrome, is a condition that causes the breakdown of the skin and soft tissues of half of the face. Symptoms and severity vary from person to person. This condition tends to begin in childhood between the ages of 5 and 15 years, and worsen over the course of 2 to 10 years before stabilizing. In addition to the skin and soft tissues, the deterioration can involve the mouth and tongue, facial bones, eye socket, and eye. Other symptoms may include loss of facial hair, changes in skin color in affected areas, seizures, and episodes of severe facial pain. Treatment may involve reconstructive or microvascular surgery. Currently, the cause of the condition is unknown. Source: Genetic and Rare Diseases Information Center (GARD), supported by ORDR-NCATS and NHGRI.