Table 2.

Characteristics of included studies

No	Authors	No of patients	Race	Age	Sex	Site of origin	Histology	Local recurrence	Cranial Involvement	Latency (years)	Surgery cranial	Radiation Therapy	Other metastasis	Recurrence	Outcome
1	Harrer 1970 [29]	1	Caucasian	52	F	Maxillary	\	No	Anterior cranial fossa	23	No	No	Yes (Lung)	No	Dead 6 month
2	Kyriazis et. al. 1971 [30]	1	Caucasian	73	M	Maxillary	Follicular	Yes	Orbit	5	No	No	No	No	Dead 1 year
3	Shaw and Katsikas 1973 [31]	1	\	81	M	Maxillary	\	No	Orbit	0	No	50 gy	No	Yes	Dead 4 year
4	Daramola et. Al 1980 [32]	1	\	22	M	Maxillary	Follicular	Yes	Orbit	5	Yes	36 gy	Yes (lung)	No	Dead
5	Komisar et. al. 1984 [25]	1	\	63	M	Maxillary	Plexiform	Yes	Orbit, Anterior cranial fossa	2	No	No	No	No	Dead
6	Weiss et. al. 1985 [33]	1	\	72	M	Maxillary	Mixed	Yes	Orbit, Middle cranial fossa	5	Yes	No	No	Yes (1 year)	Dead
7	Oka et. Al. 1986 [34]	1	Asian	27	M	Mandibular	\	Yes	Middle cranial fossa	18	Yes	No	No	Yes (4 years)	Dead 1 year
8	Bredenkamp et. al. 1989 [4]	5	African	53	M	Maxillary	Mixed	No	Middle cranial fossa	0	No	64 gy	No	No	Alive
			Caucasian	59	F	Maxillary	Plexiform	No	Orbit	0	Yes	No	No	No	\
			Caucasian	43	M	Maxillary	Follicular	Yes	Middle cranial fossa	13	Yes	No	No	Yes	Alive
			Caucasian	15	M	Maxillary	Plexiform	Yes	Orbit	2	Yes	65 gy	No	Yes (3 years)	Dead 1 year
			Caucasian	36	F	Nasal	\	No	Anterior cranial fossa	2 months	Yes	No	No	No	Alive
9	Eliasson et. Al. 1989 [35]	1	\	40	F	Maxillary	\	Yes	Orbit, Middle cranial fossa	\	\	\	Yes (Lung)	Yes (8,5 year)	Alive
10	Scaccia et. al. 1991 [36]	2	Caucasian	53	M	Maxillary	\	Yes	Orbit, Middle cranial fossa	13	Yes	No	No	Yes (2 years)	Alive
			Caucasian	60	M	Maxillary	Follicular	No	Orbit	3	Yes	No	No	No	Alive
11	Phillips et. al. 1992 [10]	1	Caucasian	65	M	Mandibular	Mixed	Yes	Parieto-occipital	15	Yes	Yes	No	Yes (1 years)	\
12	Sato et. al. 1994 [37]	1	Asian	79	M	Maxillary	Follicular	Yes	Orbit, Anterior cranial fossa	9	Yes	No	No	No	Alive
13	Hayashi et. al. 1997 [38]	1	Asian	63	F	Mandibular	\	Yes	Orbit, Middle cranial fossa	27	Yes	29 Gy	No	No	Alive
14	Zarbo et. al. 2003 [39]	1	African	14	F	Maxillary	Spindle cell	Yes	Anterior cranial fossa	29	No	No	No	No	Dead 1 month
15	Goldenberg et. al. 2004 [40]	2	Caucasian	77	F	Mandibular	\	Yes	Not specified	10	Yes	\	No	\	\
			Caucasian	37	F	Maxillary	\	Yes	Anterior cranial fossa	3	No	Yes	No	\	Dead 1 month
16	Leibovitch et. al. 2006 [41]	2	Caucasian	73	M	Maxillary	Follicular	Yes	Middle cranial fossa	30	Yes	No	No	\	\
			Asian	60	F	Mandibular	\	Yes	Not Specified	7	Yes	Yes	No	\	\
17	Chen et. al. 2006 [27]	3	Asian	42	F	Mandibular	Mixed	Yes	Orbit, Anterior cranial fossa	15	Yes	No	No	Yes (6 years)	Alive
			Asian	57	F	Maxillary	Follicular	Yes	Fronto-temporal	13	Yes	No	No	Yes (4 years)	Dead
			Asian	34	F	Mandibular	Follicular	Yes	Fronto-temporal	17	Yes	No	No	Yes (3 years)	Alive
18	Yoshida et. Al. 2009 [42]	1	Asian	70	F	Maxillary	\	Yes	Fronto-temporal	\	\	\	\	\	\
19	Woodroffe et. al. 2013 [9]	1	Caucasian	60	M	Maxillary	\	Yes	Clivus	4	Yes	65 Gy	No	1 year	Alive
20	Rotellini et. al. 2016 [43]	1	Caucasian	29	M	Maxillary	Plexiform	Yes	Orbit, Middle cranial fossa	20	Yes	60 Gy	No	8 months	Alive
21	Quick-Weller et. al. 2016 [44]	1	African	57	M	Maxillary	\	Yes	Anterior cranial fossa	12	Yes	No	No	No	Alive
22	Bettoni et. Al. 2018 [45]	1	African	22	M	Mandibular	Papillary	Yes	Right parietal lobe	4	Yes	No	No	No	Alive
23	Li et. Al. 2019 [46]	1	Asian	28	F	Mandibular	\	Yes	Left frontal lobe	5	No	SRS 24,2 gy	Yes (lung)	\	\