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I have been diagnosed with single cystic mass in the right upper lobe of my baby girl during my 20th week ultrasound scan. The size of the cystic mass was 8,7mm, complementary ultrasound scan 5 days later revealed that the mass was grown to 9,5mm. Everything else was normal with my baby, as well as triple-test done weeks earleir.

I was told to have ulrtasound scans every two weeks, the doctor also proposed me to take amniocentesis. Is it necessary to do the amniocenthesis because of the lung cyst? How often such abnormalities are associated with genetic issues? From which size the cyst may become harmful for the baby? What is the standard treatment procedure of fetal lung masses?

Thank you!

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replied April 25th, 2010
Complications during Pregnancy Answer A11539
Welcome to the ehealthforum and I am really glad to help you out.

Many fetuses with lung masses show improvement of the sonographic (ultrasound) findings in utero, and many infants may not be symptomatic at birth.

Around 50% of fetuses with the lung masses have to undergo surgery. Around 10% such fetuses have other genetic abnormalities and thus it makes sense to undergo the amniocentesis.

The size of the mass became smaller in approximately 50% during gestation. Please do consult a pediatrician for the same. I sincerely hope that helps. Take care.

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