How is mesoblastic nephroma differentiated from Wilms tumor on imaging?

Updated: Mar 04, 2019
  • Author: Ali Nawaz Khan, MBBS, FRCS, FRCP, FRCR; Chief Editor: Eugene C Lin, MD  more...
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Mesoblastic nephroma is the most common congenital renal neoplasm. It is a solitary hamartoma, and it is usually benign and unilateral. Sonograms show mesoblastic nephroma as a complex mass that may contain cystic areas. A Wilms tumor may also appear as a multiloculated mass. Antenatal diagnosis is possible. On sonograms, mesoblastic nephroma is seen as a large, solitary, predominantly solid, coarse, and echogenic renal mass that may contain cystic areas. It may be associated with polyhydramnios.

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