[Intraoperative fluorescence diagnostics upon recurrent operations for brain gliomas]

Area of Science:

• Neurosurgery
• Oncology
• Medical Imaging

Context:

• 5-aminolevulinic acid (5-ALA) fluorescent diagnosis (FD) is established for primary brain tumors.
• Its application in recurrent gliomas remains less explored.
• Accurate intraoperative tumor delineation is critical for maximizing resection and improving patient outcomes.

Purpose:

• To evaluate the efficacy of 5-ALA FD combined with laser spectral analysis for recurrent glioma surgery.
• To assess the intraoperative demarcation capabilities of FD in this patient population.

Summary:

• 19 patients with recurrent Grade II-IV gliomas underwent surgery using 5-ALA FD and laser spectral analysis.
• Detectable fluorescence was observed in all cases, with quantitative analysis of protoporphyrin IX (PP IX) indices.
• Light scattering analysis showed an inverse correlation with fluorescence, providing complementary tissue information.

Impact:

• 5-ALA FD can assist in defining tumor resection margins for recurrent cerebral gliomas.
• High sensitivity necessitates critical evaluation in post-radiation cases due to potential non-specific PP IX accumulation.
• Light scattering analysis offers additional insights into surgical wound tissue characteristics.