The outcome of the operation was compared between patients taking Gliolan (operated under blue light) and that of patients who did not take any medicines to improve the visibility of the tumour (operated under normal white light).
Võrreldi lõikuse tulemust Gliolani saanud patsientidel (opereeriti sinises valguses) ja neil, kes ei võtnud kasvaja eristamise parandamiseks ühtegi ravimit (opereeriti tavalises valges valguses).