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Prenatal Detection of Fetal Abdominal Cysts: Can We Reassure Future Parents?

H Heinrich1,2, E W M Grijseels1, R Bakx3,4

  • 1Department of Obstetrics and Gynecology, Amsterdam UMC, Universiteit of Amsterdam, Amsterdam, the Netherlands.

Prenatal Diagnosis
|February 6, 2026
PubMed

Insights

Isolated fetal abdominal cysts often regress spontaneously, but early diagnosis and larger cyst size increase the need for postnatal surgical intervention. Continued follow-up is recommended for all cases.

Area of Science:

  • Perinatal Medicine
  • Fetal Surgery
  • Pediatric Surgery

Background:

  • Isolated fetal abdominal cysts are congenital anomalies detected during prenatal screening.
  • Understanding their natural history and predictors of surgical intervention is crucial for perinatal management.

Purpose of the Study:

  • To evaluate the perinatal outcome of isolated fetal abdominal cysts.
  • To correlate the timing of prenatal diagnosis with postnatal surgical intervention needs.
  • To identify prenatal characteristics associated with postnatal surgical intervention.

Main Methods:

  • Retrospective review of fetuses with isolated abdominal cysts diagnosed between January 2007 and December 2022.
  • Exclusion of cases with multiple congenital anomalies or suspected renal/spinal origin.
  • Multivariate analysis to identify predictors of surgical intervention.

Main Results:

  • Spontaneous regression occurred in 67.6% of cases.
  • Surgical intervention was required in 16.2% of cases.
  • Prenatal cysts >40 mm and diagnosis before 24 weeks gestation were significantly associated with higher odds of surgery.

Conclusions:

  • Isolated fetal abdominal cysts generally have a favorable prognosis with high spontaneous regression rates.
  • Early diagnosis and larger cyst size are associated with increased risk of persistent lesions requiring surgery.
  • Postnatal follow-up is recommended, even with suspected prenatal regression.
Abstract

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