1. Anatomical subsites of the lip.
Lip and Oral Cavity
Anatomical subsites of the lip.
Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, ©American Joint Committee on Cancer

2. Anatomical sites and subsites of the oral cavity.
Lip and Oral Cavity
Anatomical sites and subsites of the oral cavity.
Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, ©American Joint Committee on Cancer

3. Anatomical sites and subsites of the oral cavity.
Lip and Oral Cavity
Anatomical sites and subsites of the oral cavity.
Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, ©American Joint Committee on Cancer

4. Anatomical sites and subsites of the oral cavity.
Lip and Oral Cavity
Anatomical sites and subsites of the oral cavity.
Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, ©American Joint Committee on Cancer

5. Lip and Oral Cavity
Characteristics of lip and oral cavity tumors. (a) Exophytic. (b) Ulcerated. (c) Endophytic.
Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, ©American Joint Committee on Cancer

6. T1 is defined as tumor 2 cm or less in greatest dimension.
Lip and Oral Cavity
T1 is defined as tumor 2 cm or less in greatest dimension.
Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, ©American Joint Committee on Cancer

7. T1 is defined as tumor 2 cm or less in greatest dimension.
Lip and Oral Cavity
T1 is defined as tumor 2 cm or less in greatest dimension.
Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, ©American Joint Committee on Cancer

8. Lip and Oral Cavity
T2 is defined as tumor more than 2 cm but not more than 4 cm in greatest dimension.
Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, ©American Joint Committee on Cancer

9. Lip and Oral Cavity
T2 is defined as tumor more than 2 cm but not more than 4 cm in greatest dimension.
Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, ©American Joint Committee on Cancer

10. T3 is defined as tumor more than 4 cm in greatest dimension.
Lip and Oral Cavity
T3 is defined as tumor more than 4 cm in greatest dimension.
Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, ©American Joint Committee on Cancer

11. T3 is defined as tumor more than 4 cm in greatest dimension.
Lip and Oral Cavity
T3 is defined as tumor more than 4 cm in greatest dimension.
Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, ©American Joint Committee on Cancer

12. T3 is defined as tumor more than 4 cm in greatest dimension.
Lip and Oral Cavity
T3 is defined as tumor more than 4 cm in greatest dimension.
Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, ©American Joint Committee on Cancer

13. Lip and Oral Cavity
T4a (lip) is defined as moderately advanced local disease, tumor invading through cortical bone, inferior alveolar nerve, floor of mouth, or skin of face, i.e., chin or nose (as shown).
Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, ©American Joint Committee on Cancer

14. Lip and Oral Cavity
T4a (oral cavity) is defined as moderately advanced local disease, tumor invading adjacent structures only (e.g., through cortical bone [mandible or maxilla] into deep [extrinsic] muscle of tongue (genioglossus, hyoglossus, palatoglossus, and styloglossus), maxillary sinus, or skin of face.
Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, ©American Joint Committee on Cancer

15. Lip and Oral Cavity
T4b is defined as very advanced local disease, tumor involves masticator space, pterygoid plates (as shown), or skull base and/or encases internal carotid artery.
Compton, C.C., Byrd, D.R., et al., Editors. AJCC CancerStaging Atlas, 2nd Edition. New York: Springer, ©American Joint Committee on Cancer