Surgical Management of T2N0 Lateral Tongue Squamous Cell Carcinoma

Primary Tumor Resection

• Partial glossectomy is the standard operative technique for T2 oral tongue carcinoma, aiming for wide, tumor‑free margins while preserving tongue function (National Comprehensive Cancer Network) 1.
• Reconstructive closure (local/regional flap, free‑tissue transfer, or graft) should be performed only after achieving tumor‑free margins; reconstruction must never compromise oncologic clearance (National Comprehensive Cancer Network) [2][3].
• Any gross residual disease at the primary site must be removed, even if this requires sacrifice of adjacent structures (National Comprehensive Cancer Network) [2][4].

Elective Neck Dissection

• For a clinically N0 neck, ipsilateral selective neck dissection must include at least levels I‑III (National Comprehensive Cancer Network) [1][4].
• If postoperative radiation is not planned, extending the dissection to level IV is recommended (National Comprehensive Cancer Network) 1.
• Bilateral neck dissection is not indicated for a unilateral lateral tongue tumor that does not approach or cross the midline (National Comprehensive Cancer Network) [1][4].
• Contralateral submandibular (level I) dissection is only indicated when the primary tumor approximates or crosses the midline (National Comprehensive Cancer Network) [2][4].

Post‑operative Management (Pathology‑Driven)

• When surgical margins are negative, no nodal involvement is identified, and no high‑risk pathological features are present, observation alone is appropriate (National Comprehensive Cancer Network) 1.
• In the same low‑risk scenario, postoperative radiation may be offered as an optional option (Category 2B) (National Comprehensive Cancer Network) 1.
• If a single positive lymph node is found without other adverse features, re‑excision of the primary site should be considered (National Comprehensive Cancer Network) 1.
• Postoperative radiation may also be considered in the presence of a solitary positive node, depending on additional risk factors (National Comprehensive Cancer Network) 1.

Indications for Adjuvant Chemoradiation

• Postoperative chemoradiation is the preferred adjuvant therapy (Category 1) when any of the following adverse features are present:
  
  • Extracapsular spread of nodal disease
  • Positive surgical margins
  • Two or more positive lymph nodes (National Comprehensive Cancer Network) 1.

Recommended Chemotherapy Regimen

• Concurrent single‑agent cisplatin (100 mg/m² administered every 3 weeks for three cycles) is the recommended chemotherapy component of adjuvant chemoradiation (National Comprehensive Cancer Network; supported by additional evidence from the Annals of Oncology) [1][5].

Selective Neck Dissection for Clinically Node‑Negative Lateral Tongue Squamous Cell Carcinoma

Extent of Dissection

• The National Comprehensive Cancer Network (NCCN) recommends that, for oral cavity tumors with clinically N0 necks, a selective neck dissection must include at least levels I‑III on the side of the primary lesion. This is the minimum required extent for a T2N0M0 lateral tongue carcinoma. 6

• Contemporary practice often extends the selective neck dissection to levels I‑IV when postoperative radiation is not planned, reflecting a broader but still selective approach. 7

• “Level G” is not part of the standard cervical lymph‑node classification; therefore it should not be considered in the dissection plan. 6

Lymph‑Node Level Definitions (Relevant to Oral Cavity)

• Level VI is specifically noted as not applicable to oral cavity tumors such as tongue SCC. 6

Laterality Considerations

• For a unilateral right‑lateral tongue tumor that does not approach or cross the midline, ipsilateral (right‑sided) selective neck dissection only is appropriate. 6

• Bilateral neck dissection is reserved for tumors that are at, approach, or cross the midline, or for advanced anterior tongue or floor‑of‑mouth lesions with similar midline involvement. 6

• Contralateral submandibular dissection is indicated only when the primary tumor approximates or crosses the midline, to achieve adequate oncologic resection. 6

Pathologic Examination

• The NCCN emphasizes that the neck‑dissection specimen must undergo adequate pathologic examination with proper orientation to confirm that all intended lymph‑node levels have been removed and evaluated. 8

Neck Dissection Recommendations for T2N0 Lateral Tongue Squamous Cell Carcinoma

Indications for Elective Neck Dissection

Minimum Extent of Dissection

Required Neck Levels

Levels Not Routinely Included