Fig. 3. Performance rates of surveillance tests in group 1 (patients who attended the VHL clinic once a year), group 2 (patients who attended the VHL clinic once, but did not participate in annual follow-ups), and group 3 (patients who were not registered at the VHL clinic, but who visited only the specialists relevant to their clinical manifestations).
Abbreviations: CNS, central nervous system; CT, computed tomography; MRI, magnetic resonance imaging; US, ultrasonography.

Ann Lab Med 2022;42:352~357 https://doi.org/10.3343/alm.2022.42.3.352