Table 1.

Numbers of specimens and histological diagnosis. n°: numbers.

	n° of Samples	n° of Spectra
Glioma tissue	38	2073
Grade II
Astrocytoma, WHO grade II (IDH-mutant)	0 (0)	-
Oligodendroglioma, WHO grade II (IDH-mutant)	4 (10.5)	220
Grade III
Astrocytoma, WHO grade III (IDH-mutant)	5 (13.2)	259
Oligodendroglioma, WHO grade III (IDH-mutant)	12 (31.6)	642
Grade IV
Glioblastoma, WHO grade IV (IDH wild-type)	14 (36.8)	773
Glioblastoma, WHO grade IV (IDH mutant)	3 (7.9)	179
Normal Tissue	25	1377
Total	63	3450