Phase III Clinical Trial Evaluating the Resection Efficacy of 5-Aminolevulinic Acid Hydrochloride (5-ALA HCl) Fluorescence-Guided Microsurgery Versus Conventional White Light Microsurgery in Patients With Malignant Glioma (WHO Grade 3/4)

Patients were randomly assigned to 5-aminolevulinic acid (20 mg/kg bodyweight）Those randomly allocated to 5-aminolevulinic acid were scheduled to receive freshly prepared solutions of 5-aminolevulinic acid orally 3 h (range 2-4) before induction of anaesthesia. Solutions were prepared by dissolving the contents of a vial (1·5 g) in 50 mL of drinking water.