When the fetus forms a cysts on the person in charge is within a risk of the infant have genetic abnormality?

At 23 wks my unborn baby developed a cyst on the back side of her head. Can that head to my baby being born with genetic abnormality?
Answers:    My 4th child presented with what I think without googling be a hypochondroid cyst or along that line in an ultrasound. The next ultrasound perform for other reasons it had dissapeared. Now I have a on form 5yo but was also told they were harmless to babies and do usually dissapear.

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