VHL syndrome (Von Hippel-Lindau syndrome) is an inherited disorder characterized by the formation of tumors and fluid-filled sacs (cysts) in many different parts of the body. Tumors may be either noncancerous or cancerous and most frequently appear during young adulthood; however, the signs and symptoms of von Hippel-Lindau syndrome can occur throughout life. In families with a medical history of VHL syndrome, the presence of one tumor associated with the disorder is considered diagnostic.
Genetic testing involves studying the VHL gene for disease-causing changes (variants or mutations). All that’s needed for this test is a blood sample.