Book contents
- Pregnancy Complications
- Pregnancy Complications
- Copyright page
- Contents
- Contributors
- Preface
- Note from the Editor-in-Chief
- Normal Laboratory Values (Conventional Units) []
- Section 1 Antepartum (Early Pregnancy)
- Section 2 Antepartum (Mid-trimester)
- Section 3 Antepartum (Late Pregnancy)
- Section 4 Antepartum (Medical Complications)
- Section 5 Antepartum (Infectious Complications)
- Section 6 Intrapartum/Delivery
- Section 7 Postpartum
- Section 8 Fetal Complications
- Case 74 A 40-Year-Old at 28 Weeks’ Gestation with a Well Dated Pregnancy and a Fundal Height Measuring 24 cm
- Case 75 A 45-Year-Old at 37 Weeks’ Gestation with Gestational Diabetes and an Estimated Fetal Weight of 4,600 g
- Case 76 A 20-Year-Old at 37 Weeks with a Twin Gestation Presents for Delivery Planning
- Case 77 A 25-Year-Old at 18 Weeks’ Gestation Presents with a Monochorionic/Diamniotic Twin Pregnancy
- Case 78 A 25-Year-Old at 22 Weeks’ Gestation with Mild Fetal Renal Pelvis Dilation on an Anatomic Survey Ultrasound
- Section 9 Placental Complications
- Section 10 Complications of the Cord, Amnion, and Gravid Uterus
- Section 11 Psychosocial Considerations
- Index
- References
Case 78 - A 25-Year-Old at 22 Weeks’ Gestation with Mild Fetal Renal Pelvis Dilation on an Anatomic Survey Ultrasound
from Section 8 - Fetal Complications
Published online by Cambridge University Press: 08 April 2025
Book contents
- Pregnancy Complications
- Pregnancy Complications
- Copyright page
- Contents
- Contributors
- Preface
- Note from the Editor-in-Chief
- Normal Laboratory Values (Conventional Units) []
- Section 1 Antepartum (Early Pregnancy)
- Section 2 Antepartum (Mid-trimester)
- Section 3 Antepartum (Late Pregnancy)
- Section 4 Antepartum (Medical Complications)
- Section 5 Antepartum (Infectious Complications)
- Section 6 Intrapartum/Delivery
- Section 7 Postpartum
- Section 8 Fetal Complications
- Case 74 A 40-Year-Old at 28 Weeks’ Gestation with a Well Dated Pregnancy and a Fundal Height Measuring 24 cm
- Case 75 A 45-Year-Old at 37 Weeks’ Gestation with Gestational Diabetes and an Estimated Fetal Weight of 4,600 g
- Case 76 A 20-Year-Old at 37 Weeks with a Twin Gestation Presents for Delivery Planning
- Case 77 A 25-Year-Old at 18 Weeks’ Gestation Presents with a Monochorionic/Diamniotic Twin Pregnancy
- Case 78 A 25-Year-Old at 22 Weeks’ Gestation with Mild Fetal Renal Pelvis Dilation on an Anatomic Survey Ultrasound
- Section 9 Placental Complications
- Section 10 Complications of the Cord, Amnion, and Gravid Uterus
- Section 11 Psychosocial Considerations
- Index
- References
Summary
Mild urinary tract dilation (formerly termed fetal pyelectasis or hydronephrosis) of the fetus is the most common variant identified on the fetal anatomic survey ultrasound. This finding can indicate an increased risk of aneuploidy, specifically Trisomy 21, however, it is also common in genetically normal pregnancies. New noninvasive prenatal testing options have reduced the need for invasive fetal genetic testing previously required for antenatal diagnosis. Surveillance during the pregnancy and neonatal period should be performed as urinary tract malformation can also result in renal pelvis dilation. Severe dilation should prompt the involvement of pediatric urology prior to birth for neonatal planning.
- Type
- Chapter
- Information
- Pregnancy ComplicationsA Case-Based Approach, pp. 242 - 244Publisher: Cambridge University PressPrint publication year: 2025
References
Nguyen, H, Benson, C, Bromley, B, et al. Multidisciplinary Consensus on the Classification of Prenatal and Postnatal Urinary Tract Dilation (UTD Classification System). J Pediatr Urol. 2014;10:982–999.CrossRefGoogle ScholarPubMed
Barakat, A, Butler, A. Renal and Urinary Tract Abnormalities Associated with Chromosome Aberrations. Int J Pediatr Nephrol. 1987;8(4):215–226.Google ScholarPubMed
Corteville, J, Dicke, J, Crane, J. Fetal Pyelectasis and Downs Syndrome: Is Genetic Amniocentesis Warranted? Obstet Gynecol. 1992;79(5):770–772.Google ScholarPubMed
Coco, C, Jeanty, P. Isolated Fetal Pyelectasis and Chromosomal Abnormality. Am J Obstet Gynecol. 2005;193(3 Pt. 1):732–738.CrossRefGoogle Scholar
Prabhu, M, Kuller, J, Biggio, J. Society for Maternal Fetal Medicine Consult Series #57: Evaluation and Management of Isolated Soft Ultrasound Markers for Aneuploidy in the Second Trimester. Am J Obstet Gynecol. 2021;225(4):B2–B15.CrossRefGoogle Scholar
Jain, S, Chen, F. Developmental Pathology of Congenital Kidney and Urinary Tract Anomalies. Clin Kidney J. 2019;12(3):382–399.Google ScholarPubMed
Lee, R, Cendron, M, Kinnamon, D. Antenatal Hydronephrosis as a Predictor of Postnatal Outcome: A Meta-analysis. Pediatrics. 2006;118(2):587–593.CrossRefGoogle ScholarPubMed