[A Case of renal Lymphangiectasia with a Follow-Up Duration of Twelve Years].

Renal lymphangiectasia is a rare disorder of renal lymphatics, which is not well-known in terms of its natural history. A 54-year-old woman without any symptoms was referred to our department for huge cystic lesions surrounding bilateral kidneys. Imaging examinations with ultrasonography, and computed tomography suggested renal lymphangiectasia of bilateral kidneys. These cystic lesions were increased in size 12 years later, compared with previous magnetic resonance imaging. This finding suggested the slow growing nature of renal lympahngioectasia.