Table 2.

Brain tumors encountered in the German Neuropathology Reference Center for Epilepsy surgery

Tumor entity	Number (%)	Location temporal	Age @ Onset	Disease Duration	Age @ Surgery
GG	886 (52.7)	81.6%	12,8	11,8	25,0
DNT	288 (17.1)	72.5%	14,6	10,8	25,0
PA	90 (5.4)	65%	14,9	11,9	24,2
LGNET	62 (3.7)	78.3%	17,3	12,8	29,4
IDG	40 (2.4)	42.5%	14,9	15,3	24,9
AG	13 (0.8)	53.8%	5,0	14,3	15,8
MVNT	6 (0.4)	66.7%	17,3	20,7	35,2
PGNT	4 (0.2)	75%	12,0	1,0	23,3
Total of LEAT	1389 (82.7)	76.8%	13,6	11,8	25,1
PXA	41 (2.4)	85.3%	18,6	12,2	29,7
CYSTS	34 (2)	82.4%	22,4	11,7	35,2
OLIGO	99 (5.9)	53.4%	24,2	12,4	38,1
ASTRO	70 (4.2)	57.1%	26,2	6,5	32,8
MEN	24 (1.4)	45.5%	40,7	6,2	46,1
OTHER	23 (1.4)	52.9%	17,1	9,5	26,8
Total of non-LEAT	291 (17.3)	61.6%	24,2	10,0	35,1
Total	1680	74.0%	15,5	11,5	26,9

GG ganglioglioma, DNT dysembryoplastic neuroepithelial tumor, PA pilocytic astrocytoma, LGNET low-grade neuroepithelial tumors (not otherwise specified), IDG isomorphic diffuse glioma, AG angiocentric glioma, PGNT papillary glio-neuronal tumor, MVNT multinodular and vacuolated neuronal tumor of the cerebrum, PXA pleomorphic xanthoastrocytoma, CYSTS dermoid, epidermoid or arachnoidal cysts (excluding LEAT with cystic components), OLIGO diffuse gliomas with oligodendroglial phenotypes, i.e. oligodendrogliomas or mixed oligoastrocytomas diagnosed before discovery of IDH1 mutations and 1p/19q co-deletions, ASTRO diffuse glioma with astroglial phenotypes, MEN meningioma, OTHER brain tumors of low frequency including desmoplastic infantile ganglioglioma, neurocytoma, osteoma, subependymoma, or teratoma). Location: specifying the percentage of tumors located in the temporal lobe; Age@onset: age at onset in years. Disease duration: duration of epilepsy in years. Age@surgery: age at surgery in years