RT Book, Section
A1 Weinberg, Aviva E.
A1 Kennedy, William A.
A2 Stevenson, David K.
A2 Cohen, Ronald S.
A2 Sunshine, Philip
SR Print(0)
ID 1109798989
T1 Renal Masses and Urinary Ascites
T2 Neonatology: Clinical Practice and Procedures
YR 2015
FD 2015
PB McGraw-Hill Education
PP New York, NY
SN 9780071763769
LK accesspediatrics.mhmedical.com/content.aspx?aid=1109798989
RD 2024/04/19
AB Abdominal  masses  are  frequent  in  the  neonate,  and  nearly  two-thirds  are  renal  in  origin.  Most  are  benign,  representing  hydronephrosis,  multicystic  dysplastic  kidney  (MCDK),  polycystic  kidney  disease,  or  congenital  mesoblastic  nephroma.  Less  commonly,  a  flank  mass  may  be  caused  by  a  malignant  renal  lesion,  such  as  a  Wilms  tumor.  The  initial  diagnosis  may  be  made  on  prenatal  ultrasonography  (US),  found  in  an  asymptomatic  infant  on  physical  palpation,  or  discovered  as  a  consequence  of  postnatal  imaging  performed  for  hypertension,  hematuria,  urinary  sepsis,  or  difficult  feeding  in  the  new  infant.1  Fetal  ultrasonography  may  demonstrate  not  only  the  renal  mass  but  also  associated  findings,  such  as  oligohydramnios,  polyhydramnios,  renal  cysts,  hydronephrosis,  and  bladder  wall  thickness,  which  may  aid  in  developing  a  more  specific  diagnosis  in  the  antenatal  period.2  Early  recognition  of  renal  masses  may  allow  timely  treatment  of  congenital  renal  anomalies  that  would  otherwise  be  missed  because  of  their  asymptomatic  nature.