RESUMEN
Parry Romberg syndrome (PRS), also known as progressive hemifacial atrophy, is a very rare self-limiting disease, which affects the skin and subcutaneous tissues, underlying musculature, cartilage, and bony structures of one half of the face with a resultant hemiatrophy and alopecia areata. It presents in children and young adults, with a slow progression of the atrophy for several years, and then becomes stable. Magnetic resonance imaging (MRI) or computed tomography (CT) scan of the cranium demonstrates the radiological feature of hemiatrophy very clearly. We report a case of PRS in a nine-year-old girl with characteristic features which was diagnosed based on medical history, clinical signs, and radiological findings on cranial CT scan and MRI.