ABSTRACT
PURPOSE: We report two cases of brothers diagnosed with oculocerebrorenal syndrome after binocular congenital cataract surgery. METHODS: Two brothers who had undergone surgeries for congenital cataracts showed growth retardation, proteinuria, and generalized tonic seizures. The patients were referred to the pediatrics department and evaluated for systemic diseases and genetic counseling. RESULTS: Two brothers had renal tubular dysfunction characterized by hypercalciuria and hyperphosphaturia. The older brother had multiple microcalcifications on both kidneys, and ischemic injury with general dysfunction of the brain. Genetic analysis of brothers and their mother showed a new mutation of P799L in the region of the chromosome Xq25-26.1 locus. The two brothers were diagnosed with oculocerebrorenal syndrome of Lowe (OCRL). CONCLUSIONS: In cases of patients with congenital cataracts, the evaluation of systemic disease including genetic abnormality should be considered whenever systemic symptoms such as growth retardation, proteinuria or seizure are found.