Pregnancy
Surveillance investigations should ideally be performed prior to any planned conception, if possible. If pre-conception surveillance was not able to be performed, routine surveillance MRIs performed during pregnancy should be without contrast. There is no need for additional surveillance during the pregnancy if the patient remains asymptomatic. There are conflicting studies about whether there is risk of progression of VHL associated tumours, particularly CNS haemangioblastomas, during pregnancy. Undiagnosed phaeochromocytoma may pose additional risks during pregnancy, especially during labour and delivery. Consider referral to a specialist high-risk pregnancy unit.
Hearing loss and vestibulopathy
Irreversible hearing loss, tinnitus, vertigo and cranial nerve dysfunction can occur due to endolymphatic sac tumours. The early detection of hearing loss and vestibulopathy and surgical intervention can preserve hearing and ameliorate vestibular symptoms.r
Renal cell carcinoma
Multicentric and bilateral renal cell carcinomas (RCC) are common. For small renal masses, defined as renal masses < 3 cm, active surveillance with MRI is recommended. The management of RCCs should be undertaken in a unit with expertise in VHL disease and nephron-sparing surgery.r
Pancreatic cysts
The most common pancreatic manifestation in VHL disease is pancreatic cysts, which can usually be followed expectantly. These are essentially never malignant processes, and intervention should be based only on patient symptoms or an inability to discern them from other lesions with malignant potential.r