Table 2.

Outcomes of US-guided PEI for treatment thyroid nodules.

Reference	Country	Number of nodules	Type of nodule	Volume of ethanol injected (mean ± SD)	Number of sessions (mean ± SD)	Therapy success (%)	Follow-up (months)
This research	Brazil	52	Mixed and solid	9.1 ± 10.3 ml (total)	2.8 ± 1.9	75	10 months
Perez et al. (2)	Brazil	120	Cystic, mixed, solid, and autonomous	6.2 ml (total)	2.8	70	6 months–11 years
Basu et al. (36)	India	60	Cystic and mixed	NA	NA	78	12.3 months
Kim et al. (33)	South Korea	30	Solid	2.3 ml (first session)	1.2	60	15 months
Tarantino et al. (32)	Italy	124	Cystic, mixed, and solid	14 ml (total)	4	66	60 months
Del Prete et al. (37)	Italy	98	Cystic	NA	NA	94	9 years
Cho et al. (38)	South Korea	22	Cystic and mixed	NA	1.2	68	3.5 months
Zingrillo et al. (39)	Italy	43	Cystic	NA	NA	93	5 years
Yasuda et al. (40)	Japan	61	Cystic and mixed	NA	1.26	72.1	1–6 months
Bianchini et al. (41)	Brazil	26	Solid	10 ml	5	74	12 months
Lee et al. (34)	South Korea	198	Solid	NA	2.2 ± 1.4	89	36.2 months

NA, not available.