Case of the Week # 519

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Fabien Ho

Case of the week # 519
June 4, 2020 - June 25, 2020

Dr Ho F.1, Dr Cuillier F.2, Dr Frade F.3

1. Radiologist, private sector, 97400 Saint-Denis, Reunion Island, France.ʉ۬
2. Department of Obstetrics, Felix Guyon Hospital, Reunion Island, France.

3. Department of Pediatric Surgery, Felix Guyon Hospital, 97400 Saint-Denis, Reunion Island, France.ʉ۬


Case report 

This patient has been referred to our hospital after abnormal 3rd trimester routine screening. 
1st and 2nd trimester ultrasound were normal. Down syndrome screening was negative. Previous personal, familial and obstetrical history is non relevant.
 Our sonographic examination at 35 weeks of pregnancy revealed the following anomalies at the posterolateral side of the neck. We then performed fetal MR imaging.

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Answer

Answer to the case of the week # 519
June 4, 2020 - June 25, 2020

Dr Ho F.1, Dr Cuillier F.2, Dr Frade F.3

1. Radiologist, private sector, 97400 Saint-Denis, Reunion Island, France. 
2. Department of Obstetrics, Felix Guyon Hospital, Reunion Island, France.
3. Department of Pediatric Surgery, Felix Guyon Hospital, 97400 Saint-Denis, Reunion Island, France. 


Case report 
This patient has been referred to our hospital after abnormal 3rd trimester routine screening. 
1st and 2nd trimester ultrasound were normal. Down syndrome screening was negative. Previous personal, familial and obstetrical history is non relevant. Our sonographic examination at 35 weeks of pregnancy revealed the following anomalies at the posterolateral side of the neck. We then performed fetal MR imaging.


Images 1-4: US exam revealed a solid, round, echogenic, homogenous soft tissue mass located on the posterolateral side of the neck, with clear margins, with peripheral vessels. One major high-flow arterial blood supply was also identified, probably a collateral of the external carotid artery.

 


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