Prenatal ultrasound and magnetic resonance imaging features of fetal ovarian cyst and postnatal follow-up assessment
ZHANG Qiao
LI Xinyan
ZHOU Chunqiao
WEI Hui
CHEN Huiyan
HUANG Weibao
Abstract：Objective To investigate the prenatal ultrasonographic features,magnetic resonance imaging(MRI)characteristics,and postnatal follow-up evaluation of fetal ovarian cysts.Methods A retrospective analysis was conducted on cases of suspected fetal ovarian cysts detected by prenatal ultrasound.Parameters including gestational age,cyst location,size,internal echogenicity,and MRI signal characteristics were systematically analyzed.Based on outcomes,cases were categorized into vanishing and non-vanishing groups.The non-vanishing group underwent surgical intervention and was further subdivided into torsion and non-torsion subgroups.Comparative analyses were performed on cyst echogenicity,dimensional changes,and positional variations across subgroups.Results Among 164 initially identified ovarian cysts,33 cases were lost to follow-up and one case underwent pregnancy termination,resulting in 130 cases for final analysis.The vanishing group(n=102,78.5%)demonstrated significantly higher proportions of simple cysts(88/102,86.3%)and positional stability(100/102,98.0%)compared to the non-vanishing group(P<0.05).Among 28 surgically managed non-vanishing cases,torsion occurred in 12 cases(42.9%),all presenting as complex cysts.The torsion subgroup exhibited 100%complex cyst morphology(12/12)compared to 25%(4/16)in non-torsion cases(P<0.05).The difference between the changes in size and location of cysts in the two groups was not statistically significant(P>0.05).Median cyst volumes significantly differed between torsion 18.7(12.8,61.1)cm3 and non-torsion groups 69.7(49.9,149.2)cm3,(P<0.05).Conclusion Surveillance of fetal ovarian cysts should prioritize complex morphology and monitor dimensional/positional changes.Combined ultrasound-MRI evaluation is recommended for persistent complex cysts to facilitate early detection of adnexal torsion and optimize torsional prognosis.
Keywords：fetusprenatal ultrasoundovarian cystmagnetic resonance imagingovarian cyst torsion
Publication Date：2025-03-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 365-370 )