A 58-year-old woman presents with a 6-week history of a rapidly enlarging, painful mass in the left submandibular gland region. On examination, the mass is 3.5 cm, firm, fixed to underlying tissues, and the overlying skin appears erythematous. There is mild ipsilateral cervical lymphadenopathy. FNAC shows malignant cells consistent with adenocarcinoma. What is the most appropriate next step in management?

Explanation

## Clinical Presentation of Malignant Salivary Gland Tumor **Key Point:** The clinical red flags for **malignancy** in this case are: - **Rapid growth** (6 weeks) - **Pain** (suggests nerve/tissue invasion) - **Fixed mass** (not mobile — indicates infiltration) - **Skin involvement** (erythema) - **Cervical lymphadenopathy** (nodal metastasis) - **FNAC confirms adenocarcinoma** ## Management of Malignant Submandibular Gland Tumors **High-Yield:** The standard treatment protocol for **malignant salivary gland tumors** is: | Step | Rationale | |------|----------| | **Staging imaging** (CECT/MRI) | Assess local extent, nodal involvement, distant metastases | | **Radical submandibular gland excision** | Remove primary tumor with adequate margins | | **Ipsilateral neck dissection** | Remove lymph nodes (N1 disease present clinically) | | **Facial nerve preservation** | Attempted if tumor not directly invading nerve | | **Adjuvant radiotherapy** | High-grade tumors, perineural invasion, positive margins, advanced stage | **Clinical Pearl:** In this patient: - **Lymph node involvement (N1)** mandates **neck dissection** (not observation) - **Skin involvement** suggests **advanced local disease** → radical surgery required - **CECT** is essential for **pre-operative staging** to assess: - Depth of invasion - Mandibular bone involvement - Nodal extent (unilateral vs. bilateral) - Distant metastases (chest CT) ## Surgical Principles for Malignant Salivary Gland Tumors ```mermaid flowchart TD A[Malignant salivary gland tumor<br/>FNAC positive]:::outcome --> B[CECT chest + neck<br/>for staging]:::action B --> C{Nodal involvement?}:::decision C -->|N0| D[Radical gland excision<br/>+ elective neck dissection]:::action C -->|N1-N3| E[Radical gland excision<br/>+ therapeutic neck dissection]:::action D --> F{Nerve invasion?}:::decision E --> F F -->|No| G[Preserve facial/lingual nerve]:::action F -->|Yes| H[Sacrifice nerve<br/>with tumor]:::urgent G --> I[Adjuvant radiotherapy<br/>if high-grade/<br/>perineural invasion]:::action H --> I ``` **Mnemonic:** **RADICAL** approach to malignant salivary gland tumors: - **R**adical excision of primary tumor - **A**djacent structures (skin, bone) resected if involved - **D**issection of regional lymph nodes (therapeutic if N+) - **I**maging (CECT/MRI) before surgery - **C**omplete staging (chest CT for distant metastases) - **A**djuvant radiotherapy for high-risk features - **L**ong-term follow-up (recurrence risk 30–50%) ## Why Neck Dissection is Mandatory **High-Yield:** Cervical lymphadenopathy (N1 disease) in this patient indicates: - **Therapeutic neck dissection** is indicated (not elective) - Omitting neck dissection leaves occult nodal disease behind - Survival is significantly worse without nodal treatment - Level I–III nodes (submandibular, anterior cervical) must be removed