Q. Kindly explain the factors used to calculate the risk of trisomy 21.

Answered by
Dr. Uzma Arqam
and medically reviewed by iCliniq medical review team.
Published on Nov 07, 2018

Hi doctor,

My NT scan showed me a range of 1.4 mm and my double marker showed me a risk of 1:20300. But my age risk showed a result of 1:176. Which one has to be considered and what it signifies regarding the risk for trisomy 21?

Dr. Uzma Arqam

Obstetrics And Gynaecology
#

Hi,

Welcome to icliniq.com.

I have gone through the query (attachment removed to protect patient identity). Many factors count for calculating risk. They are age, serum markers, family history, and nuchal translucency. An age-related risk is more after 35 years of age. As you are 38 years old, so the risk is calculated as 1:176. But, individually it cannot define the whole risk as it involves other factors also.

Nuchal translucency less than 2.9 mm is considered normal, and you have a range of 1.4 mm, so the factor does not show a risk for an anomaly. Serum markers show a least negligible risk like 1 in 20300. So this factor is also not under threat. You have not mentioned about your family history as it will also play a role in calculating the all over risk. So the combined risk is decidedly less. Have a usual anomaly scan at 20 weeks to check for any anomaly. Around 22 weeks, try to have a cardiac outflow tract.

Ask a QueryAsk a Query Consult by PhoneConsult by Phone Video ChatVideo Chat
Also Read Answers From:

Related Questions & Answers


Do my wife's NT scan and double marker test results show a high risk for Down's syndrome?

Query: Hi doctor, My wife had NT scan and double marker test at 12 weeks and 3 days of pregnancy. The report is as follows, CRL is 59.2 mm, NT is 1.45 mm, free beta-hCG is 84.84 IU/L, equivalent to 2.217 MoM and PAPP-A 0.712 IU/L equivalent to 0.282 MoM. Trisomy 21 is 1: 450 1:47 and trisomy 18 is 1: 5315...  Read Full »

Popular

Popular

Ask your health query to a doctor online?

Ask an Obstetrician & Gynaecologist Now

* guaranteed answer within 4 hours.
Enter Your Health Query
You can upload files and images in the next step.

Fee:  

 


Disclaimer: All health Q&As published on this website is not intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek the advice from your physician or other qualified health-care providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website.