title: Growing Renal Mass: Lessons Learned on the Road From an Atypical Presentation to Successful Therapy.
abstract: A 25 4/7 week boy was born with a prenatal diagnosis of polyhydramnios and enlarged left kidney. Over the next 2 months serial ultrasounds demonstrated abnormal growth of the kidney, with 28.9% split function. At gestational age 39 4/7, he underwent a left radical nephrectomy. Pathology revealed congenital mesoblastic nephroma with mixed classic and cellular features. This case was puzzling due to prenatally diagnosed renal enlargement in a premature infant and inconclusive post-natal ultrasonographic imaging. Although the patient had paraneoplastic signs of polyhydramnios and hypertension, the mass did not have a classic appearance of CMN; possibly due to severe prematurity.
authors.affiliation: Division of Urology, University of Pennsylvania Health System, Philadelphia, USA.
authors.forename: Eliza
authors.initials: E
authors.lastname: Lamin
authors.affiliation: Division of Urology, The Children's Hospital of Philadelphia, Philadelphia, USA; Department of Radiology, The Children's Hospital of Philadelphia, Philadelphia, USA.
authors.forename: Dana A
authors.initials: DA
authors.lastname: Weiss
authors.affiliation: Department of Radiology, The Children's Hospital of Philadelphia, Philadelphia, USA.
authors.forename: Kassa
authors.initials: K
authors.lastname: Darge
authors.affiliation: Department of Pathology, The Children's Hospital of Philadelphia, Philadelphia, USA.
authors.forename: Fumiko
authors.initials: F
authors.lastname: Dekio
authors.affiliation: Division of Urology, The Children's Hospital of Philadelphia, Philadelphia, USA.
authors.forename: Douglas A
authors.initials: DA
authors.lastname: Canning
keywords: CMN, congenital mesoblastic nephroma; Congenital mesoblastic nephroma; Peak systolic velocity; RVT, renal venous thrombosis; Renal masses; Renal venous thrombosis; US, ultrasound