Hemimaxillary Enlargement, Asymmetry of the Face, Tooth Abnormalities, and Skin Findings (HATS) Syndrome: A Case Report and Review of the Literature.

Hemimaxillary enlargement, asymmetry of the face, tooth abnormalities, and skin findings (HATS) syndrome, a rare developmental disorder, involves the first and second branchial arches and is characterized by hemimaxillary enlargement, abnormal appearance of skin and teeth, and facial asymmetry. It is generally detected at birth or during early childhood and is associated with unilateral abnormalities of the face, including the bones, teeth, gums, and skin. Becker nevus is the most common cutaneous manifestation of HATS syndrome. Although patients with HATS syndrome have been treated with various therapeutic regimens, no standard or definitive treatment regimen has been established. This study describes this rare condition in a 12-year-old girl.