Facial hemiatrophy
Facial hemiatrophy
Definition
Progressive hemifacial atrophy (PHA) is a rare acquired disorder, characterized by unilateral slowly progressive atrophy of the skin and soft tissues of half of the face leading to a sunken appearance. Muscles, cartilage and the underlying bony structures may also be involved.
Also known as hemifacial atrophy, parry-Romberg syndrome, progressive facial hemiatrophy, progressive hemifacial atrophy, Romberg syndrome — per MONDO