The purpose of our educational exhibit is to help radiologists : Recognize common and rare presentation of bilateral renal lesions. Seek association with extra-renal features. Narrow the differential diagnosis to reduce time to final diagnosis.

Bilateral renal lesions are common findings. The radiologists should be able to recognize some typical common and rare patterns. We selected cases with bilateral renal lesions issued from large tertiary referral centers demonstrating an educational interest. For each case we provideclinical setting, radiological description and tips. We propose a classification of these case as follows : Tumoral: Nephroblastoma Leukemia Lymphoma Chromophobe RCC Oncocytomatosis Hereditary papillary Renal Cell...

BILATERAL RENAL LESIONS : TUMORAL 1. Nephroblastoma : Male infant (6 y.o.) -Exploration of abdominal pain and parental palpation of an abdominal mass. US shows bilateral renal masses, slightly more echogenic than renal parenchyma. MRI confirms bilateral renal tumors, with the typical characteristics of nephroblastoma (hyperT2, hypoT1, heterogeneous enhancement). Final diagnosis is bilateral nephroblastomas without metastasis, probably part of a undefined syndrome (still currently being...

Bilateral renal lesions are common findings and radiologists should know specific associations to narrow the differential diagnosis.

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