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Asymmetric variations of the contralateral structures of the head and face occur commonly in the general population and are an accepted feature of morphogenesis. A gross asymmetry characterized by marked unilateral overdevelopment of hard and soft tissues of head and face is a rare congenital malformation and has been termed as hemifacial hypertrophy (HFH). The etiology is unknown, but several theories have been proposed including hormonal imbalances, diseases involving the neural system,doi:10.5005/jp-journals-10011-1325 fatcat:zipfvqxh5vb2hmk4j4pcqrvzhi