TABLE 2.

Characteristics of Patients Aged 55 Years or Below Selected for Sequencing to Detect IDH Mutations in Codons 132 and 172

Diagnosis	Grade	M/F	Age Mean/Range (y)	Mutated IDH Codons R132 and 172 /Total
Oligodendroglioma	II	0/1	9	0/1 (0%)
1p/19q co-deleted		0	—	0
Anaplastic oligodendroglioma	III	1/2	46 (30-54)	2/3 (67%)
Diffuse astrocytoma	II	5/5	35 (23-53)	6/10 (60%)
Anaplastic astrocytoma	III	4/2	43 (33-54)	2/6 (33%)
Glioblastoma	IV	26/17	48 (24-55)	2/43 (5%)

F indicates female; IDH, isocitrate dehydrogenase; M, male.