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Anogenital malformation with ambiguous genitalia as part of the OEIS complex

A 30-year-old primigravid woman presented at 14 weeks’ gestation with multiple large umbilical cord cysts (Figure 1) and a left-sided single umbilical artery on ultrasound. Minimal bladder filling was present and structural malformations were not seen. Amniocentesis revealed a normal female karyotype (46,XX). The umbilical cord cysts were seen to persist at 20 weeks but had diminished in size by the 32-week scan. At that time ultrasound revealed an infra-umbilical flat cyst-like structure, minimal bladder filling, ambiguous genitalia and a tubular structure above the external genitalia (Figure 2) that resembled a prolapsed terminal ileum as part of cloacal extrophy. In order to document the condition in more detail magnetic resonance imaging