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  • tumor
  • The sensitivity and specificity of 5-ALA - Protoporphyrin IX (Pp IX) as an intraoperative fluorescent detection agent and aid for resection of tumor tissue remaining in the walls of the resection cavity of primary and recurrent malignant brain tumors. (clinicaltrials.gov)
  • RATIONALE: Photodynamic therapy uses light and photosensitizing drugs to kill tumor cells and may be an effective treatment for refractory brain tumors. (clinicaltrials.gov)