The Reliability of the Tracheoesophageal Groove and the Ligament of Berry as Landmarks for Identifying the Recurrent Laryngeal Nerve: A Cadaveric Study and Meta-Analysis

Table 3

Table of studies included in the Recurrent Laryngeal Nerve-Berry Ligament meta-analysis.

Study	Country	Type of study	= (nerves)	Berry’s Ligament
				Superficial (%)	Piercing (%)	Deep (%)
Present study	Poland	C	72	90.3	6.9	2.8
Asgharpour 2012 [3]	England	C	185	88.1	11.9	0
Berlin and Lahey 1929 [7]	USA	I	44	100	0	0
Berlin 1935 [27]	USA	I	140	75.0	25.0	0
Botelho et al. 2012 [28]	Brazil	C	41	61.0	19.5	19.5
Çakir et al. 2006 [8]	Tukey	C	130	100	0	0
Chen et al. 2008 [16]	China	C	100	0	5	95
Freschi et al. 1994 [9]	Italy	I	84	41.7	0	58.3
Hunt et al. 1968 [10]	Australia	C	151	47.0	0	53.0
Kaisha 2011 [29]	Kenya	C	121	67.0	7.4	25.6
Leow and Webb 1998 [11]	England	C	25	100	0	0
Ngo Nyeki et al. 2015 [1]	Cameroon	I	62	93.5	6.5	0
Pradeep et al. 2012 [12]	India	I	584	61.8	31.2	7.0
Sasou et al. 1998 [2]	Japan	I	486	100	0	0
Sunanda et al. 2010 [30]	Sri Lanka	I	45	55.5	6.7	37.8
Wade 1955 [31]	Wales	I	200	10	25	65