[Persistent cysts of the choroid plexus as sonographic indications of a genetic defect].

In the case of a 29-year-old woman an early SGA (small for gestational age) fetus was detected in her third pregnancy. This fact being already a possible indicator for a genetical defect, the fetus also showed permanent cysts of the Plexus choroideus as a sonographical symptom of a deletion of the chromosome 10 (10 qter). The value of Plexus choroideus cysts sonographically diagnosed during pregnancy is discussed by showing the differential diagnoses, the clinical proceedings in general and specially the indications for a chromosomal analysis.