Javascript er ikke aktivert i din nettleser. Dette er nødvendig for å bruke Oncolex. Kontakt din systemadministrator for å aktivere JavaScript.

Staging of oral cancer

Oral cancer is separated into lateral tumors and midline tumors.

  • Lateral tumors – bucca, gingiva and retromolar space with a minimum of 1 cm distance to the midline without spreading to contralateral lymph nodes.
  • Midline tumors – tongue, floor of the mouth and hard palate. Tumors growing toward the midline have a tendency for bilateral lymph node spreading.

Epithelial tumors are classified according to the Union for International Cancer Control (UICC) (3,4).

T classification

The T classification represents the extent of the primary tumor.

  • T1 – small tumors ≤ 2 cm of greatest diameter
  • T2 – tumors 2–4 cm of greatest diameter


  • T3 – Tumors > 4 cm, < 6 cm
  • T4 – Advanced tumors with invasion of neigboring organs, muscle, bone, and skin (2).


N classification

The N classification represents spreading to regional cervical lymph nodes measured in greatest diameter.

  • N0 – no regional lymph node metastases
  • N1 – single ipsilateral lymph node metastasis ≤ 3 cm
  • N2
    • a – single ipsilateral lymph node metastasis > 3 cm ≤ 6 cm
    • b – multiple ipsilateral lymph node metastases ≤ 6 cm
    • c – bilateral or contralateral lymph node metastases ≤ 6 cm
  • N3 – lymph node metastases > 6 cm

M classification

The M classification represents distant metastases.

  • M0 – no distant metastases
  • M1 – distant metastases


Oslo University Hospital shall not be liable for any loss whether direct, indirect, incidental or consequential, arising out of access to, use of, or reliance upon any of the content on this website. Oslo University Hospital© 2018