Should dopamine agonist treatment stop in pregnant patients with recurrent prolactinoma despite prior surgery?

That depends on the size of the residual adenoma, the distance from the optic chiasm, and on the responsiveness of the adenoma to cabergoline. If patient had surgery, I am assuming that was poorly responsive to DA. Sometimes it is prudent to stop during the first trimester, and re-start after organogenesis is complete, but the decision is to be mase on a case by-case basis. A baseline neuro-ophthalmology exam is always important.