P13.24: Behaviour of fetuses with choroid plexus cyst

Abstract

Choroid plexus cyst detected during 20th week screening without other abnormalities is a case of controversy. The risk of trisomie 18 is 1:30–1:50. Incidence of choroid plexus cyst vary from 0.18% to 3.6%. The aim of our work was to find out, if fetuses with unilateral plexus cyst have normal fetal behaviour. Accessing of fetal behaviour by 3/4 D ultrasound was assayed on population of pregnant women during second trimestral ultrasound.1340 pregnant women were examined. Unilateral choroid plexus cyst without other sonografic anomalies was detected in 11 cases (0.82%). All patients had born healthy children without any neurological defect. The control group consist of random 31 singleton pregnancies with normal morphological findings. Fetal behaviour was assessed during 15 minutes by ¾ D. Frequency and speed of antebrachium movements was detected. The hand movements was slected to two goups: rapid movement (more than 0.1 m/s); and slow movement (less than 0.1 m/s). 31 fetuses of control group made 2964 movements of antebrachium during assessing time (15 min.). The average number of movements was 95.6. thereof 72.4 rapid movements and 23 slow movements. 873 movements were observed by fetuses with choroid plexus cyst. The average movement frequency was 79.3 movement/15 min, thereof 42.5 rapid movements and 37 slow movements. Differences between two groups were evaluated by Student t-test. Fetuses with choroid plexus cyst were different in behaviour. Frequency of movements was similar, but the quality was different. Fetuses with choroid plexus cyst made more slow antebrachial movements (P < 0.01) and less rapid movements (P < 0.05) compared with the control group. It seems that, the quality of behaviour of fetuses with choroid plexus cyst reminds of the behaviour older fetuses with maturated connections of cereberal and cerebral structures. These startling results show a new point of view on maturation of fetal central nervous system and cerebral tracts.