What is Gleolan?

Gleolan (aminolevulinic acid hydrochloride) is an optical imaging agent used during brain tumor resection. Exogenous administration of ALA leads to accumulation of the ALA metabolite PpIX in tumor cells Gleolan is indicated in patients with glioma [suspected World Health Organization (WHO) Grades III or IV on preoperative imaging] as an adjunct for the visualization of malignant tissue during surgery.