Evolution of first-trimester subchorionic hematoma into a large symptomatic placental cyst: A case report
Abstract
Background: Placental cysts are rare, often incidental findings. Large cysts (>4.5 cm) are clinically ominous due to their association with fetal growth restriction (FGR).Case Presentation: A 28-year-old primigravida presented at 6 weeks with a 2.9 cm subchorionic collection. By 35 weeks, this evolved into a 3.9 cm placental cyst at the cranial end, complicated by oligohydramnios (AFI 4-5 cm) and late-onset FGR. Following induction at 38 weeks, a 2.856 kg healthy boy was delivered. Gross examination revealed a blood-filled cyst delivered just before the placenta.Conclusion: Persistent first-trimester hematomas may serve as precursors to significant placental cysts. Serial monitoring via ultrasound and Doppler is vital to manage associated risks of FGR and oligohydramnios.
Fields of Study & Subjects
Pregnancy and preeclampsia studies
Maternal and fetal healthcare
Gestational Trophoblastic Disease Studies
Publication details
- Journal / source
- International Journal of Clinical Obstetrics and Gynaecology
- Volume
- 10
- Issue
- 1
- Pages
- 779–781
- Publication date
- 1 January 2026
- Language
- EN