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NT Scan test results of the 3rd month - Online Doctor Chats

Date : 21-Feb-2012
User rating for this question
Very Good Posted in: Pregnancy
Answered by

General & Family Physician
Practicing since : 2005
Answered : 2408 Questions
User :   Hello Doctor
Doctor :   hi
Doctor :   Dr. XXXXXXXX here.
Doctor :   please proceed with your health query
User :   My Wife is 3months Pregnant
User :   She has undergone NT Scan
User :   They have conducted following test
User :   1. Downs syndrome
User :   2.Edwards Syndrome
User :   3. Patau's syndrome
User :   What generally the result should be for the above?
Doctor :   the diagnosis usually depends on the Neural tube thickness and the karyotyping test
Doctor :   the thickned NT can be cause for all teh above said differential diagnosis
Doctor :   the exact cause can be confirmed by getting a karyotyping test done on the fetus/amniotic fluid and on both of you.
User :   ok, as a restult- hCGb- 9.13 and PAPP-A- 2.00
User :   And all the 3 syndrome's test results in Low
User :   What exactly that indicates?
Doctor :   the low levels of PAPP-A might indicate that there is no spinal defect associated
User :   Ok
User :   and How about 3 Syndrome's result?
Doctor :   what further tests were done to confirm which of the 3 is present?
User :   Sorry i didn't get you?
Doctor :   all the 3 syndromes suggested are chromosomal anomalies
Doctor :   they should be confirmed by doing a karyotyping test
Doctor :   discuss about getting this test done on the amniotic fluid with your gynecologist
Doctor :   you and your wife too will need to get this test done to see from whose side the child got the abnomal gene
User :   our distance relation has abnormal gene that too from her side
User :   So, nothing to do with 3 Syndrome test i mentioned?
User :   They mentioned like
User :   Downs syndrome
User :   Prior risk: 1:1500
Doctor :   yes. go ahead
User :   Posterior risk:1:350
User :   cutoff 1:250
User :   Risktype Risk at term
User :   result low
Doctor :   ok. are the results same for the other two also?
User :   yes
Doctor :   the test result you mentioned now suggests possibility of 1 child having the syndrome in about 1500-1350 births

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