Ref. No.

No. Examined

 No. (%) incidence of oral cancer

Perriman [18]

202

Palat-19 (11.3%), tongue-38 (22.5%), lips-50 (29.5%), maxilla-21 (12.3%), floor of the mouth-26 (15.4%), buccal commissure-47 (26.6%), retromolar regions-14 (8.2%).

Al-Niaimi [19]

119

Palat-14 (11.7%), tongue-28 (23.5%), lips-49 (41.1%), floor of the mouth-9 (7.5%),

buccal mucosa -8 (6.7).

Talabani, et al. [34]

73

Tongue-16 (21.9%), unspecified-57 (78.1%).

Museedi &Younis [22]

1787

Tongue (o.47%), lips (0.3%), salivary gland (0.195).

 Taha &Younis [20]

1664

Lip-382 (23%), tongue -711 (42.75%), Gingiva-83 (5.09%), Floor of the mouth-98 (5.9%), palate 72-(4.3%), unspecified- 318 (19.1%).

 Al-Kawaz [35]

129

Tongue-72 (55.8%), floor of the mouth-5 (3.9%), unspecified-52 (40.3%).

Khudier [15]

82

Lower lip (39%), tongue (20%), salivary gland (19.6%).

Fuoad, et al. [14]

302

Palat-33 (10.9%), tongue- 50 (16.5%), lip-39 (12.9%), oropharynx-62 (20.5%), maxilla-45 (14.9%), jaw-38 (12.6%), salivary gland-35 (11.7%).

Aljazaeri, et al. [21]

560

Tongue-101 (18%), buccal mucosa-89 (15.9%), salivary gland- 34 (6.1%), gingival-88 (15.7%).

 Al-Mahfoud, et al. [23]

21

Palat-3 (14.3%), tongue-5 (23.8%), cheek-3 (14.28%), lips-2 (9.52%), oropharynx-3 (14.3%), post nasal space-1 (4.76%), salivary gland-1 (4.76%), jaw-1 (4.76%).

 Alshami, et al. [36]

318

Unspecified