DDx

The Complicated Decision-Making of a Molar Pregnancy and an Intrauterine Pregnancy


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A pregnant person is referred early in pregnancy to high-risk obstetrician Dr. Stacey Ehrenberg after an ultrasound detects an abnormally developing placenta. Dr. Ehrenberg diagnoses the patient with a molar pregnancy; a placenta that forms into a benign tumor with the potential to become cancerous. While the molar pregnancy will not survive, the patient also has a viable intrauterine pregnancy.

Faced with this diagnosis, Dr. Ehrenberg counsels her patient about the risks of continuing or discontinuing the pregnancy. If the decision is made to continue, the patient risks developing mirror syndrome, a life-threatening condition marked by hypertension and edema. There is also significant risk of bleeding if any of the abnormal tissue is removed.

If the decision is made to end the pregnancy, the patient faces the risks of any procedure done in a hospital; bleeding, infection, and damage to the surrounding organs, although this happens in less than 1% of cases. Regardless of the patient’s choice, Dr. Ehrenberg emphasizes that she and her team will support the patient, no matter what. 

The patient decides to continue the pregnancy. Dr. Ehrenberg and team develop a care plan to track both the molar pregnancy and the intrauterine pregnancy with weekly ultrasounds and blood pressure measurements. 

“I really watched her struggle throughout the pregnancy knowing that she knew that at some point the scale was going to tip and that this would no longer be safe for her to continue,” shared Dr. Ehrenberg. “Her hope, as was ours, was that she would be able to get far enough in pregnancy where the baby would be able to survive. She knew that this would probably be an extremely premature baby, but she was willing to take that risk to start her family.”

But at 19 weeks, everything changes. 

“I didn't need vital signs. I didn't need to do a physical exam to know something wasn't right,” remembered Dr. Ehrenberg. “We got vital signs on her and I did a physical exam, and it was very clear to me that she had mirror syndrome and then we had to have the very difficult conversation that we knew that the baby was not yet viable, but it was no longer safe for her to remain pregnant.”

The decision is clear: the only viable option is dilation and evacuation. 

But the procedure is not without serious complications and risks. 

“... These pregnancy complications are so complex,” shared Dr. Ehrenberg. “The physical aspects of it, the emotional aspects of it, the financial aspects of it … So I really just would love to see more kindness towards other people, more tolerance towards other people, more understanding that we don't understand all the time where other people are coming from and what they've been through.”

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