Usefulness of cutaneous ultrasound in the management of Parry Romberg syndrome

Dear editor, Parry Romberg syndrome (PRS), also known as progressive hemifacial atrophy, is a rare craniofacial disorder characterized by unilateral facial atrophy affecting the skin, subcutis, muscle, and bones.1 PRS is considered a severe variant of linear morphea, sharing some features with en coup de sabre scleroderma. Diagnosis is often delayed1 and clinical monitoring is challenging. Visible changes are usually subtle, and decisions are often based on subjective impressions from the patient or physician. We would like to share our experience on the use of cutaneous highfrequency ultrasonography (HFUS) in the management of patients with PRS. A 30yearold woman presented with a 15year history of