“…Tumour details included: grade (n = 5 studies) [31,43,52,54,57]; type (n = 12) [31, 33, 36, 40-42, 44, 45, 47, 49, 52, 53], predominantly astrocytoma, oligodendroglioma, and oligoastrocytoma; laterality (n = 13) [31,33,35,36,38,39,42,44,45,49,52,54,57]; and location (n = 12) [31,33,35,36,39,42,44,45,[47][48][49]57], largely frontal lobe. Four studies reported genetic markers [33,42,45,53]. Sixteen studies reported treatment [12, 33, 35, 36, 38, 40-42, 44, 45, 47, 48, 50, 52, 54, 57], including chemotherapy, radiotherapy, and extent of surgical resection.…”