Bilateral Renal Lymphangiectasia Associated With Polycythemia: A Rare Case Report.

Renal lymphangiectasia is a rare benign mesenchymal tumor of unclear etiology resulting from dilatation of perinephric lymphatic channels and formation of cystic masses. Polycythemia is a rarely associated finding with only five cases reported in the literature. We report a case of bilateral renal lymphangiectasia associated with polycythemia in a 38-year-old man who was managed conservatively with pain control. There are no clear guidelines for the management of renal lymphangiectasia; although most patients can be treated conservatively, some cases, whose diagnosis is unclear or develop complications, require definitive surgical excision.