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Oral Tongue SCCa - Rads

last modified on: Tue, 05/09/2017 - 13:07

Oral Tongue Squamous Cell Carcinoma

  •  Defined as any squamous cell carcinoma which begins on the surface of the oral tongue
  •  Spreads to the floor of mouth via the hyoglossus muscle if origin is the posterior oral tongue
  •  Spreads to the floor of the mouth via the mylohyoid muscle is origin is the lateral oral tongue
  •  Speads posteriorly to the base of tongue and/or the glossotonsilar sulcus
  •  Ipsilateral nodal involvement occurs 34-65% of cases and bilarteral nodal involvement in 12% of cases
  •  Nodes at levels I, II, and III are most commonly involved
  •  If tumor crosses the midline a total glossectomy may be necessary
  •  On CT: look for mandibular invasion on non-contrast; may variably enhance with contrast and tracking to the floor of the mouth may be observed
  •  On MR: Low intensity on T1; high signal seen on T2; varible enhancement with T1 post-contrast, necrosis and rim-enhancment may be seen in large lesions
  •  Accounts for 22% of all oral cavity cancers
  •  Highly associated with smoking and alcohol use
  •  Most common in men between the ages of 50 and 70