Year

Author

Patients

Site

Stage

Findings

1997

Omura [19]

472

Tongue

Floor of mouth

7/385(1.9%)

2/87

7 LLN

1 L-LLN

1 L-LLN/M-LLN

1999

Woolgar [22]

99

Lateral Tongue

Ventral Tongue

T3

T4

T2

T4

2/60 (5.05%)

1/39

2/39

M-LLN

M-LLN

M-LLN

L-LLN

2009

Ando [20]

248

Tongue

Specifically

T1/T2

14/223 (6.3%)

Parahyoid⁺

2016

Suzuki [21]

100

Tongue

8/100(8.0%)

3 ant L-LLN

1 post L-LLN

4 parahyoid

2018

Jia [23]

111

Tongue

Floor of mouth

N2

19/111(17%)

5/111(4.5%)

LLN identified

LLN⁺

2019

Fang [24]

231

Tongue

58/231(25%)

33/231(14.3%)

LLN identified

LLN⁺

2020

Hoffman

181

Tongue

Floor of mouth

T3N2A

T2N1

T2N2B

11/181(7.73%)

3/181(1.65%)

LLN

L-LLN⁺

M-LLN⁺

L-LLN⁺