Pregnancy NT scan first trimester

Patient: My wife is 29 year old 13 weeks pregnant we recently did the NT Scan and the NT came 2.7 mm her adjusted risk was 1:262 for trisomy 21 which made the sonographer rush us to take the double marker test we still await the results but are extremely worried. We wanted to know as a second opinion is he in a high risk zone?

Symptoms: NT scan reading for trisomy 21