Progressive hemifacial atrophy

Progressive hemifacial atrophy, also known as Parry-Romberg syndrome or Romberg disease, is a rare acquired condition characterized by slow, progressive shrinkage (atrophy) of the skin, soft tissues, muscle, cartilage, and sometimes bone on one side of the face (hemifacial). The condition typically begins in childhood or adolescence and progresses over a period of 2 to 20 years before stabilizing. The degree of atrophy can range from mild to severe, and in some cases may extend to involve the ipsilateral arm, trunk, or leg. Clinical features include unilateral facial atrophy that may affect the forehead, cheek, chin, lips, and ear regions. A visible line of demarcation, sometimes referred to as a "coup de sabre" line, may appear on the forehead or scalp, and this feature overlaps with linear scleroderma (en coup de sabre). Neurological complications can occur, including trigeminal neuralgia, migraine headaches, and seizures. Ocular involvement may include enophthalmos (sunken eye), uveitis, and changes in iris pigmentation. Skin changes such as hyperpigmentation or hypopigmentation and alopecia in the affected area are also common. The exact cause of progressive hemifacial atrophy remains unknown, though autoimmune mechanisms, sympathetic nervous system dysfunction, neurovascular abnormalities, and localized scleroderma-related processes have been proposed. Treatment is primarily symptomatic and reconstructive. During the active inflammatory phase, immunosuppressive therapies such as methotrexate and corticosteroids may be used to slow disease progression. Once the disease has stabilized, surgical reconstruction using autologous fat grafting, dermal fat grafts, bone grafts, or microvascular free flap transfer can help restore facial symmetry. Multidisciplinary care involving dermatology, neurology, ophthalmology, and plastic surgery is often necessary.

Data sourced from FDA regulatory filings and ClinicalTrials.gov. Updated periodically.

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