Depth of Invasion in Oral Cavity Cancer

  • The staging of primary tumors of the oral cavity:
    • As published by the AJCC and UICC is widely accepted
  • In its most recent revision (eighth edition of the AJCC Staging Manual):
    • Depth of invasion (DOI) is added to the surface dimensions and local extent of the tumor:
      • As the required parameters for primary tumor staging in the oral cavity
Depth of invasion and surface dimensions are the
parameters required for T staging of oral cancer
  • Accurate assessment of DOI by clinical examination is not possible:
    • However, the staging system stratifies DOI by 5 mm increments, and thus clinical estimates of DOI can be categorized into:
      • Thin (less than 5 mm)
      • Thick (5 to 10 mm)
      • Very thick (greater than10 mm)
        • By palpation to assign clinical T stage
Primary tumors of the oral cavity are categorized as thin,
thick, and very thick by palpation
  • The stage distribution of patients with squamous cell carcinoma of the oral cavity at the Memorial Sloan Kettering Cancer Center in New York is shown in the graph:
Stage distribution for squamous cell carcinoma of the oral cavity
(MSKCC data 1985 to 2015)
#Arrangoiz #CancerSurgeon #HeadandNeckSurgeon #SurgicalOncologist #MountSinaiMedicalCenter #MSMC #Miami #Mexico

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