High-grade glioma and solitary metastasis: differentiation by spectroscopy and advanced magnetic resonance techniques

Alejandra Arévalo-Sáenz1, Gregorio Rodríguez-Boto Amago2, Manuel Pedrosa Sánchez3
1Division of Neurosurgery, Neurosurgery Department, Hospital Clinico San Carlos, Hospital QuironSalud, C / Profesor Martín Lagos S/N, 28040, Madrid, Spain
2Department of Neurosurgery, Puerta de Hierro University Hospital, C / Joaquín Rodrigo, 1, 28222, Majadahonda, Madrid, Spain
3Department of Neurosurgery, Hospital Universitario de La Princesa, Hospital Sanitas La Moraleja, Hospital Sanitas La Zarzuela, C / Diego de León 62, 28006, Madrid, Spain

Tóm tắt

Abstract Background The differentiation by means of magnetic resonance between high-grade gliomas and intracranial solitary single metastasis is of the utmost importance since they condition both surgical and complementary treatment. Results Retrospective study that analyzes the parameters of advanced magnetic resonance imaging: spectroscopy, diffusion and perfusion, specifically focused on the differences in the coefficients of the metabolites Cho/Cr, Cho/NAA and NAA/Cr in peritumoral edema between high-grade gliomas and metastases. The data have been statistically analyzed using ROC (receiver operating characteristic) curves, and cutoff values were obtained. A total of 79 patients with histologically analyzed tumors were analyzed: 49 high-grade gliomas (40 multiform glioblastomas and 9 anaplastic astrocytomas) and 30 metastases. A statistically significant mean difference was obtained in the three metabolite ratios. The area under the curve for the Cho/NAA ratio was 0.958 (CI: 0.903–1), for Cho/Cr 0.922 (CI: 0.859–0.985) and for NAA/Cr 0.163 (CI: 0.068–0.258; p < 0.001). The cutoff values were 1.115 for Cho/NAA (sensitivity 93.87%, specificity 93.33%, global precision 93.67%); 1.18 for the Cho/Cr ratio (sensitivity 89.79%, specificity 93.33% and precision 91.13%) and 1.155 for the NAA/Cr ratio (sensitivity 67.34%, specificity 93.33%, global precision 44.30%). Conclusion The results of the study support the premise that spectroscopy at the level of peritumoral edema is able to differentiate between high-grade gliomas and metastases by showing tumor infiltration in peritumoral edema.

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