Table 2.

Select series of surgically treated radiation-induced meningiomas.

Author and year	N	Original diagnosis for RT	Mean age (yrs.)∗	F/M	Mean RT dose (Gy)	Mean latency (yrs.)	Histology	WHO grade	Mean follow-up (yrs.)	Recurrence
Harrison et al., 1991 [5]	7	2, tinea capitis 1, presumed sarcoma 1. prepubertal gigantism 1, thalamic glioma 1, keloid 1, astrocytoma	53.4	5/2	—	42.7	3, atypical 2, meningothelial 1, transitional 1, mixed (meningothelial, transitional, fibroblastic)	—	—	3 (42.9%)
Salvati et al., 1996 [29]	10	4, ALL 2, medulloblastoma 2, adenoma 1, carcinoma 1, astrocytoma	30.4	7/3	39.8	16.9	4, atypical 4, fibroblastic 1, meningothelial 1, transitional	—	—	1 (10%)
Sadetzki et al., 2002 [30]	253†	253, tinea capitis	43.6	1.9 : 1	—	36.3	183, NOS 63, meningothelial 38, transitional 31, fibroblastic 4, angioblastic 2, psammomatous 1, malignant 6, mixed	—	9.8	18.2%
De Tommasi et al., 2005 [31]	6	6, tinea capitis	57.7	4/2	15	40.2	2, meningothelial 2, transitional 1, choroid 1 atypical	4, I 2, II	—	0
Banerjee et al., 2009 [32]	8	8, ALL	26.5	5/3	26.5	23	3, meningothelial 2, fibroblastic 2, transitional 1, atypical	7, I 1, II	—	2 (25%)
Godlewski et al., 2012 [33]	19	4, ALL 3, NHL 3, astrocytoma 2, ependymoma 1, pituitary adenoma 1, medulloblastoma 1, “brain tumor” 1, CNS lymphoma 1, leukemia 1, germinoma 1, ganglioneuroblastoma	35.7	12/7	31.9	25.9	—	17, I 1, II 1, N/A	5.8	4 (21.1%)

*Age at diagnosis of radiation-induced meningioma.

^†220/253 patients were treated by surgical resection.

ALL: acute lymphoblastic leukemia; N/A: not available; NHL: non-Hodgkin's lymphoma; NOS: not otherwise specified; RT: radiation therapy.