text: Aminolevulinic acid is being studied for photodynamic therapy (PDT) in a number of types of cancer. It is not currently a first line treatment for Barrett's esophagus. Its use in brain cancer is currently experimental. It has been studied in a number of gynecological cancers.
  Aminolevulinic acid is indicated in adults for visualization of malignant tissue during surgery for malignant glioma (World Health Organization grade III and IV). It is used to visualise tumorous tissue in neurosurgical procedures. Studies since 2006 have shown that the intraoperative use of this guiding method may reduce the tumour residual volume and prolong progression-free survival in people with malignant gliomas. The US FDA approved aminolevulinic acid hydrochloride (ALA HCL) for this use in 2017.