Parry-Romberg syndrome affecting one half of the body.

Parry-Romberg syndrome, which is also known as progressive hemifacial atrophy, is a poorly understood rare condition. In this condition, the face shows unilateral, slowly progressive atrophy. Disturbance in fat metabolism, viral infection, trauma, heredity, endocrinal disturbances, and autoimmunity are few possible factors in its pathogenesis. Rarely, only this syndrome progresses and involves one half of the body. Our attempt is to present a case of Parry-Romberg syndrome involving one half of the body, which is a rarity in itself.