limb hypoplasia, [7] congenital ipsilateral cerebral atrophy, [8] microphthalmia [9] and renal malformations. [9] Moreover, hypertrophic cardiomyopathy, [10] hypothyroidism, [11] rheumatoid arthritis, [12] lupus erythematosus [9] and scleroderma [13][14][15] are some developmental conditions reported in PRS.Parry-Romberg syndrome, although rare, has been reported in the literature quite abundantly, and has been associated with multiple findings. The treatment options offered in the literature are diverse but not curative. [16] The present review highlights the etiology, clinical oral manifestations and treatment of PRS.
ETIOLOGYDespite PRS being recognized for >150 years, the exact etiology and pathogenesis of this condition is not well understood and seems to be heterogeneous. Cerebral disturbance on fat metabolism, local facial trauma, endocrine disturbances, autoimmunity, heredity, hyperactivity or hypoactivity of the sympathetic nervous system, abnormality of the trigeminal nerve and viral infections, including Parry-Romberg syndrome is associated with several developmental and congenital deformities, such as neurologic, ophthalmologic, cardiac, endocrine, autoimmune, cranio-maxillofacial and orthodontic abnormalities. [5] Congenital manifestations that might be associated with PRS are contralateral Poland Syndrome, [6] congenital lower