Photodynamic Diagnosis for Malignant Brain Glioma With 5-Aminolevulinic Acid（5-ALA）

Inclusion Criteria: * Patient's written informed consent * Age 18-75 years * Radiological suspicion of a malignant glioma * Indication for surgical tumour resection * Karnofsky Performance Status (KPS) ≥ 70 Exclusion Criteria: * Tumor located in the basal ganglia, thalamus, cerebellum, or brainstem * Porphyria, hypersensitivity to porphyrins，history of cutaneous photosensitivity or photosensitive skin diseases； * known hypersensitivity to the test drug ingredients * Any other condition that, in the opinion of the investigator, makes participation in the trial inappropriate;