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Asymmetric renal size in autosomal recessive polycystic kidney disease: a unique presentation.

Autosomal recessive polycystic kidney disease encompasses a wide spectrum of renal and hepatic disease. Classically, both kidneys are symmetrically enlarged and equally affected by cystic changes. Although considerable overlap may occur in the clinical and imaging features of the recessive and dominant forms of the disease, we know of no published reports of cases of proved autosomal recessive polycystic kidney disease with a disparity in renal size. We report two cases that illustrate such a disparity, adding another category of similarity between the recessive and dominant forms of polycystic kidney disease.