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Table 3 Prevalence of anatomical variations of the EBSLN according to Friedman classification

From: Is identification and dissection of the external laryngeal nerve necessary during thyroidectomy? A prospective study

Subgroups

Number of studies (number of nerves)

Type I

Type II

Type III

All the groups

7 (500)

51%

34%

15%

Peroperative

3 (381)

64%

16%

20%

Cadaverous

4 (119)

37,5%

50%

12,5%