Hello, and I hope i can help you today.
Cystic Hygroma and
Meningomyelocele are two different types of abnormailities that can be seen as a lesion in the neck region of the fetus on an
ultrasound.
Cystic Hygroma is a fluid-filled sac that protrudes from the area of the baby's neck towards the front. The sac can resolve on it's own, however fetuses with cystic hygroma have an increased risk of being genetically abnormal. The most common genetic abnormaility associated with cystic hygroma is Down's syndrome.
Meningomyelocele is cause by the fetus'
spinal cord at the neck not closing properly and some of the spinal cord tissue can bulge out in a sac-like structure. This disease sometimes requires surgery for treatment of the baby when it is born.
Neither of these possibilities has a very good prognosis for the baby. The doctor wants to check another ultrasound test when the baby is a little larger to confirm the diagnosis, and then further testing of the mother's blood and/or
amniocentesis will be necessary to determine the best plan of action.
I hope i was able to provide you with valuable information and that i could answer your question with the information available at this time. Your doctor will be able to explain better what these conditions are when the baby is a bit larger on your next ultrasound.
I wish you and your wife the best for the rest of the
pregnancy,
Dr. Brown