Pheochromocytoma and Von Hippel–Lindau in Pregnancy

ABSTRACT

Pheochromocytoma is an infrequent but well-acknowledged primary cause of malignant hypertension in pregnancy. Although the majority of pheochromocytomas are sporadic, those that present as bilateral or multifocal tumors may be a manifestation of a rare cancer susceptibility syndrome, such as Von Hippel–Lindau (VHL). Gravidae with unrecognized pheochromocytoma are at risk for recurrent paroxysmal hypertensive crises with ensuant maternal and fetal risks. To further illustrate the challenges of management of pheochromocytoma and VHL in pregnancy, we present two illustrative cases. In the first, a multigravida presented with an intrauterine fetal demise and malignant hypertension and a concurrent diagnosis of bilateral pheochromocytomas. A missense mutation in exon 3 of the VHL gene was identified, confirming the diagnosis of VHL type 2C. In the second case, a multigravida with a prior diagnosis of VHL syndrome but sporadic follow-up underwent renal and adrenal imaging surveillance as part of her prenatal care. Although she was normotensive and clinically asymptomatic, such imaging enabled the detection of bilateral pheochromocytomas. In summary, in this report we discuss our management in gravidae with pheochromocytoma and VHL, emphasizing current recommendations pertaining to obstetric management, genetic testing, and long-term follow-up.

KEYWORDS

Pheochromocytoma - Von Hippel–Lindau - pregnancy - secondary hypertension in pregnancy - renal hypertension

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