Management and Outcome of Pregnancy in Patients With Idiopathic Intracranial Hypertension: A Prospective Case Series Study.

Background And Objectives: Idiopathic intracranial hypertension (IIH) is a syndrome of increased intracranial pressure without an identifiable cause that mostly affects obese persons of childbearing age. In this prospective case series, we have evaluated the overall outcome of pregnancy and birth in participants with IIH and their newborn children. We also provide a proposal for the management of pregnant persons with IIH.

Methods: In this observational study, neuro-ophthalmological findings, the course of IIH-related symptoms, disease management, and pregnancy outcomes were evaluated. The participants were divided into 3 groups according to the course of the disease during pregnancy: stable, worsened, and new diagnosed. Furthermore, the type of delivery and outcome of newborn children such as gestational age, weight at birth, and the presence of asphyxia were compared between the groups.

Results: We observed 47 pregnancies in 42 participants; 2 had spontaneous abortions. There were 19 (47%) participants in the stable, 18 (45%) in the worsened, and 3 (8%) in the new diagnosed groups, respectively. A relapse of IIH occurred in 2 (5%). Worsening of IIH-related symptoms was experienced by 18/37 (49%) participants: headache by 17/18 (94%), tinnitus by 11/18 (61%), and vision by 7/18 (39%) (mostly in the first and second trimester). In 8/18 (44%), the symptoms were transient or alleviated in the second and third trimester. Body mass index before and after pregnancy did not significantly differ among the groups. A total of 8 participants were treated with acetazolamide. The frequency of cesarean section was 17/40 (43%). Preterm delivery occurred in 22%. No increased risk of asphyxia was observed, and all infants, but one, were healthy.

Discussion: Worsening of headache, tinnitus, and/or vision were experienced by half of pregnant participants with IIH, mostly transient in the first and second trimester, rarely required specific treatment, and were not identified as a relapse of IIH. There was no difference in gestational age and weight at birth in children among the groups, and no perinatal asphyxia was noted. Weight gain in the participants was not identified as a risk factor for relapse of IIH in pregnancy. The rate of cesarean and preterm delivery was higher than in the non-IIH population. A proposal for the management of IIH in pregnancy is provided.