A 62-year-old woman with a 20-year history of betel nut and tobacco chewing presents with a 3-month history of a painful ulcer on the left lateral border of the tongue. Examination shows an indurated ulcer with rolled margins, and palpation reveals a hard, fixed mass. Cervical lymph nodes are enlarged and firm. Biopsy confirms well-differentiated squamous cell carcinoma. CT imaging shows no distant metastases. The patient is counseled regarding treatment options. Which of the following is the most appropriate initial management for this T3N2M0 oral tongue cancer?

Explanation

## Management of T3N2M0 Oral Tongue Carcinoma ### Treatment Algorithm for Locally Advanced Oral Cavity Cancer ```mermaid flowchart TD A[Oral cavity SCC with staging]:::outcome --> B{Extent of disease?}:::decision B -->|T1-T2, N0| C[Wide local excision ± neck dissection]:::action B -->|T3-T4 or N+| D[Multimodal therapy]:::action D --> E{Resectable?}:::decision E -->|Yes| F[Surgery first: WLE + neck dissection]:::action E -->|No| G[Neoadjuvant chemo + RT]:::action F --> H{High-risk features?}:::decision H -->|Yes| I[Adjuvant RT or CRT]:::action H -->|No| J[Observation]:::action G --> K[Reassess resectability]:::decision K -->|Resectable| L[Surgery]:::action K -->|Unresectable| M[Concurrent CRT]:::action ``` **Key Point:** For T3N2M0 oral cavity cancer (locally advanced, resectable disease), surgery-first approach with wide local excision and comprehensive neck dissection is the standard of care, followed by adjuvant radiation or chemoradiation based on high-risk features. **High-Yield:** The presence of N2 disease (multiple ipsilateral nodes or bilateral nodes) mandates elective neck dissection even if clinically occult. Bilateral neck dissection is indicated for midline or bilateral nodal involvement. ### Rationale for Surgery-First Approach in Resectable Disease | Aspect | Surgery-First | Chemo-First | |--------|---------------|-------------| | **Indications** | Resectable T3–T4, any N | Unresectable or borderline resectable | | **Advantage** | Definitive local control, pathologic staging | Downstaging, organ preservation potential | | **Neck dissection** | Comprehensive (levels I–V) | Based on response | | **Adjuvant therapy** | RT/CRT if high-risk features | Reassess after response | | **5-year survival** | ~50–60% (T3N2) | Similar with multimodal approach | **Clinical Pearl:** Elective bilateral neck dissection is considered for: - Bilateral nodal involvement (N2b, N3b) - Midline primary tumors - Extensive ipsilateral disease with risk of contralateral occult metastasis In this case, N2 disease warrants bilateral assessment; however, if imaging shows unilateral disease, ipsilateral comprehensive dissection is standard. **Mnemonic:** **SWAN** — Surgery (when resectable), Wide excision, Adjuvant therapy (if high-risk), Neck dissection (elective for N+) ### High-Risk Features Requiring Adjuvant Therapy After surgery, adjuvant radiation or concurrent chemoradiation is indicated if: 1. Depth of invasion >4 mm 2. Perineural invasion 3. Lymphovascular invasion 4. Positive or close surgical margins (<5 mm) 5. Extranodal extension (ECS) in lymph nodes 6. Multiple positive nodes (N2–N3) This patient with N2 disease and likely depth >4 mm (given T3 status) will almost certainly require adjuvant CRT post-operatively. **Warning:** Do not confuse neoadjuvant chemotherapy (given before surgery to downstage unresectable tumors) with adjuvant therapy (given after surgery to reduce recurrence risk). This patient is resectable, so surgery is the primary modality.