RT Book, Section A1 Bianchi, Diana W. A1 Crombleholme, Timothy M. A1 D'Alton, Mary E. A1 Malone, Fergal D. SR Print(0) ID 1106400956 T1 Mesoblastic Nephroma T2 Fetology: Diagnosis and Management of the Fetal Patient, 2e YR 2015 FD 2015 PB McGraw-Hill Education PP New York, NY SN 978-0-07-144201-5 LK obgyn.mhmedical.com/content.aspx?aid=1106400956 RD 2024/03/29 AB Key PointsMost common congenital renal tumor.Sonographically, mesoblastic nephroma is most often a unilateral solid mass with nodular densities.Differential diagnosis includes hydronephrosis, multicystic dysplastic kidney, and nephroblastoma (Wilms’ tumor).Mesoblastic nephroma can be cystic in areas due to hemorrhage with cystic degeneration.There are 3 histologic variants: classic, cellular, and mixed.50% deliver prior to 34 weeks of gestation and are associated with polyhydramnios; 23% are hypertensive.Surgical resection is curative - local recurrence and metastases usually associated with the cellular variant.