Predictive value of prenatal ultrasound in foetal intraabdominal cystic lesions and evaluation of perinatal outcomes: a single-centre study results

The prenatal diagnosis of intra-abdominal cystic lesions is relatively common and it can be due to a wide variety of clinical conditions. The aims of this study were to determine the accuracy of the prenatal ultrasound in identifying the aetiology of foetal intra-abdominal cysts and to describe the prenatal and postnatal outcomes. This study is a retrospective analysis of 137 foetuses diagnosed with intraabdominal cysts during the prenatal period, except those originating from the urinary system, conducted from April 2015 to August 2018. Among 137 intraabdominal cysts identified as antenatal, ovarian cysts had the highest rate of prenatal diagnosis. The most frequently misdiagnosed pathologies were gastrointestinal system obstructions with 6 cases. There were 129 (94.2%)cases of intraabdominal cysts born alive. Intrabdominal cystic lesions resolved spontaneously in 23(16.8%) cases in the intrauterine period and 28 cases within 12 (20.4%) months after birth during follow-up. Postpartum surgical treatment was performed in 44 (%32.1) cases. The overall neonatal mortality was 21/137 (15.3%),with no death in the intrauterine period; 8(5.8%) of these were death following termination of pregnancy, 6(4.4%) were postpartum, and 7(5.1%) were post-surgical death. Postnatal results of intraabdominal cysts are variable. Therefore, individual assessing and managing each case is of clear benefit due to cyst's variable course. IMPACT STATEMENTWhat is already known on this subject? The prenatal diagnosis of intra- abdominal cystic lesions is relatively common and prenatal ultrasound is the main screening tool. The diagnosis of a foetal intra-abdominal cyst might represent a diagnostic and management dilemma due to the wide variety of potential diagnosis.What the results of this study add? The accuracy of prenatal ultrasound in identifying the origin of a foetal intra-abdominal cyst seems to be high with detailed ultrasonographic examinations and the perinatal outcome of these foetuses is favourable in most of them.What the implications are of these findings for clinical practice and/or future research? Regardless of the cyst's origin, it should be kept in mind that prenatal and postnatal clinical courses can be variable in each case, and every pregnant woman with a foetus with an intraabdominal cyst must be managed individually in every aspect.