Table 2.

Main features of the 15 studies included in the present systematic review

First author [ref]	Year	Country	Total PET/CT performed	TIs	Age	F/M	SUVmax	Size (mm)	FNA classified according to Bethesda							Histology
									Tot	I	II	III	IV	V	VI	Tot	Mal	Ben
Lee [17]	2012	Korea	327	17	56 ± 10	NA	4.3	NA	16	0	10	1	2	0	3	4	4	0
Kim [18]	2013	Korea	22,674	483	59 ± 11	NA	NA	NA	280	33	155	5	8	7	72	72	71	1
Choi [19]	2014	Korea	7914	171	56 ± 10	84/48	6.3	16	171	33	62	0	4	15	57	68	65	3
Lee [20]	2014	Korea	2368	64	58.8 ± 6.2	24/5	4.5	20	29	2	13	2	0	8	4	15	9	6
Jamsek [21]	2015	Slovenia	2840	148	61.2 ± 12.9	NA	4.2	NA	52	7	24	3	8	3	7	NA	NA	NA
Kim [22]	2015	Korea	18,172	374	58 ± 11	116/40	4	13	235	17	153	13	4	12	36	NA	NA	NA
Kim [23]	2015	Korea	23,462	493	50 ± 10	157/43	5.4	NA	200	14	116	12	6	13	39	72	49	23
Yoon [24]	2015	Korea	NA	87	59 ± 12	48/39	6.2	16.5	87	1	42	4	1	3	36	27	27	0
Hagenimana [25]	2017	Canada	40,914	304	NA	NA	NA	NA	159	36	63	14	23	15	8	46	25	21
Li [26]	2017	USA	NA	20	NA	12/8	NA	NA	20	0	6	2	8	2	2	11	9	2
Suh [27]	2017	Korea	96,942	1360	59 ± 11	1035/325	NA	NA	859	82	229	222	18	31	277	570	325	245
Thuillier [28]	2017	France	10,118	131	64.2 ± 11.6	55/45	NA	NA	60	16	24	5	12	1	2	19	10	9
De Guevara [29]	2020	Chile	5100	119	62	NA	NA	NA	58	1	20	4	4	8	21	NA	NA	NA
Kaliszewski [30]	2020	Poland	NA	56	56 ± 15	42/7	NA	NA	49	0	23	7	12	5	2	49	24	25
Kamakshi [31]	2020	India	1737	204	51	199/89	4.5	23	29	10	11	3	2	1	2	NA	NA	NA
TOT			232,568	4031		1772/649			2304	252	951	296	113	123	569	953	618	335

Age, SUVmax, and size findings were reported in the studies as mean or median

TI thyroid incidentaloma at PET/CT, F female, M male, NA not available