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2018-09-24  Case of the week # 481  © Behnaz Moradi

Answer to the case of the week # 481
October 11, 2018 - October 25, 2018

Behnaz Moradi, MD¹; Mohammad Ali Kazemi, MD²

1. Department of Radiology, Women’ Yas Hospital, Tehran University of Medical Sciences, Tehran, Iran.

2. Department of Radiology, Amiralam Hospital, Tehran University of Medical Sciences, Tehran, Iran.

Case report

A 30-year-old (G3P1) was referred at 35 weeks of gestation for sonographic evaluation due to a suspicion of anorectal malformation with normal second trimester anomaly scan. 

Ultrasound examination in our center revealed the following findings:

A central tubular cystic structure contains internal echo which was located posterior to bladder and anterior to the normal appearing rectum. The fetal sex was female and the target sign of anus seems to be normal. 

Both kidneys had normal location. Our preliminary diagnosis based on the US findings was hydrocolpos due to imperforated hymen which was confirmed by postnatal evaluation.

Images 1 and 2, videos 1 and 2: a cystic central structure posterior to the bladder which extend down to the genitalia in a female fetus with normal appearing target sign of anus in axial views. Normally located kidney.



Images 3 and 4, videos 3 and 4: normally appearing rectum posterior to the cystic structure in sagittal and coronal views.


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