Painless Progressive Neck Swelling in a 50-year-old Male Chronic Smoker

Key Clinical Features Summary

• Age 50, male, chronic smoker
• Left-sided, painless, progressive nodular neck swelling (1 month)
• Firm to hard consistency
• Fixed to underlying structures

Differential Diagnosis

1. Metastatic Cervical Lymphadenopathy (MOST LIKELY)

• The most likely diagnosis. Tobacco is the dominant environmental carcinogen for SCC of the larynx, hypopharynx, oropharynx, oral cavity, and nasopharynx.
• The primary tumor may be clinically occult ("unknown primary") at presentation.
• Left-sided upper/mid-cervical nodes suggest a primary in the oropharynx (base of tongue, tonsil), oral cavity, or larynx.
• Supraclavicular/lower neck nodes typically indicate a primary below the clavicles (lung, esophagus, stomach).
• HPV-associated oropharyngeal SCC most commonly presents as a new painless neck mass - even in non-smokers, but tobacco exposure compounds risk.

• Cervical nodal metastasis is the most common presenting feature.
• Often associated with unilateral nasal obstruction and epistaxis.
• Associated with EBV in endemic (East/Southeast Asian) populations.

• Particularly in a heavy smoker, lung SCC or adenocarcinoma can metastasize to cervical (especially supraclavicular/scalene) nodes.
• Left supraclavicular lymphadenopathy = "Virchow's node" - raises concern for thoracic/abdominal primaries.

• Papillary thyroid carcinoma characteristically metastasizes to cervical nodes; nodes can be hard and fixed.
• May be the presenting feature even with a small primary.

• Associated with tobacco and alcohol. Can present with left cervical nodes.

2. Lymphoma (Second most common)

• More common than Hodgkin lymphoma in this age group.
• Typically presents with firm, rubbery, non-tender enlarged nodes.
• May be associated with B symptoms (fever, night sweats, weight loss >10% over 6 months).
• Fixed, matted nodes raise concern for aggressive subtypes (diffuse large B-cell lymphoma).

• Less likely at age 50 (bimodal: 20s and >55 years).
• Characteristically involves the cervical or mediastinal nodes.
• Often associated with B symptoms and mediastinal widening on chest X-ray.

3. Salivary Gland Malignancy

• Parotid tail or submandibular gland tumors can present as firm, fixed lateral neck masses.
• Mucoepidermoid carcinoma and adenoid cystic carcinoma are the most common malignant types.
• Facial nerve involvement (palsy) would be an additional clue.

4. Less Likely Differentials

• Reactive lymphadenopathy - usually tender, softer, and associated with a recent infection; 1 month without resolution makes this unlikely
• Tuberculous lymphadenitis (Scrofula) - can be painless and progressive; typically softer/fluctuant; more common in immunocompromised or endemic-area patients
• Carotid body tumor (Paraganglioma) - pulsatile, non-tender mass at the carotid bifurcation; moves horizontally but not vertically
• Lipoma / fibroma - soft, mobile; does not fit the hard, fixed description
• Branchial cleft cyst - usually cystic and presents in younger patients; a hard fixed version may represent a "cystic" metastasis from SCC

Management

Step 1: History and Physical Examination

• Complete ENT history: dysphagia, odynophagia, hoarseness, hemoptysis, otalgia (referred pain from hypopharynx), epistaxis, nasal obstruction
• B symptoms: fever, drenching night sweats, unintentional weight loss
• Social history: tobacco (pack-years), alcohol, sexual history (HPV risk), travel/residence (TB endemic areas, EBV-endemic NPC regions)
• Physical examination: full head and neck including oral cavity, oropharynx, mirror/fiberoptic laryngoscopy, nasopharynx, salivary glands, lymph node sites outside the neck, skin of face/scalp

Step 2: Initial Investigations

• CT scan of the neck with contrast - first-line imaging to characterize the mass (size, necrosis, extracapsular spread), identify the primary tumor site, and assess deep tissue fixation
• MRI of neck - superior soft-tissue contrast; better for skull base and perineural spread
• CT thorax (chest) - essential in a smoker to look for lung primary and pulmonary metastases; combined PET-CT is preferred for locally advanced disease or when a primary is not identified
• Orthopantomogram (OPG) if oral cavity origin is suspected

• The first and most important diagnostic test for a persistent neck mass.
• Minimally invasive, rapid, and avoids "violating" the neck.
• Can distinguish carcinoma, lymphoma, and reactive causes.
• Ultrasound-guided FNAC is preferred for accuracy.
• Excisional biopsy is reserved for: (a) non-diagnostic FNAC after repeat attempts, (b) high suspicion of lymphoma with extensive adenopathy, or (c) when panendoscopy finds no primary.

• Full blood count (CBC) - leukocytosis suggests infection; lymphocytosis raises lymphoma concern
• ESR, LDH, serum uric acid (lymphoma markers)
• Liver function tests, serum calcium, alkaline phosphatase (metastatic workup)
• EBV serology (if NPC suspected)
• Thyroid function tests + TSH if thyroid origin suspected

Step 3: Endoscopic Evaluation (Panendoscopy)

• Direct laryngoscopy + esophagoscopy + bronchoscopy under anesthesia if no primary found on office examination
• Directed biopsies of the nasopharynx, tongue base, and piriform sinuses even without visible lesion (these are occult primary sites)

Step 4: Histopathological Confirmation

• Core-needle biopsy or excisional biopsy if FNAC is non-diagnostic
• HPV testing (p16 immunohistochemistry) for oropharyngeal SCC - diffuse nuclear + cytoplasmic staining in >70% of cells is considered HPV-positive (Goldman-Cecil Medicine)
• Immunohistochemistry panel to determine primary site for carcinoma of unknown primary (CUP)

Step 5: Staging (TNM Classification)

• Once pathology is established, formal TNM staging guides treatment.
• HPV-positive oropharyngeal SCC is staged separately from HPV-negative due to more favorable prognosis.
• Vocal cord mobility, depth of invasion, and extracapsular nodal extension are key staging parameters.

Step 6: Treatment (Multidisciplinary Team Decision)

• Surgery - transoral robotic surgery (TORS) or CO2 laser microsurgery for early oropharyngeal tumors; open surgery for advanced primaries
• Neck dissection - Modified radical neck dissection (MRND) or selective neck dissection depending on nodal level and extent
• Radiation therapy - Intensity-modulated radiation therapy (IMRT) is preferred to spare parotids and reduce xerostomia
• Adjuvant concurrent cisplatin + radiation - indicated for extracapsular nodal extension or positive surgical margins (high-risk features)
• Cetuximab (anti-EGFR) - used when cisplatin is contraindicated
• Immunotherapy (nivolumab, pembrolizumab) - for recurrent/metastatic disease

• Staging bone marrow biopsy + PET-CT
• Hodgkin: ABVD (adriamycin, bleomycin, vinblastine, dacarbazine) + radiotherapy
• NHL (diffuse large B-cell): R-CHOP (rituximab + cyclophosphamide, hydroxydaunorubicin, vincristine, prednisolone)

• Manage the primary site per relevant guidelines
• Cervical node treatment (surgery vs. radiation) based on extent of disease

Summary Approach: "A Neck Mass in an Adult is Cancer Until Proven Otherwise"

Painless fixed hard neck mass (age >40, smoker)
          |
          ↓
FNAC (first test) + CT neck + CXR/CT chest
          |
    ┌─────┴──────┐
  Malignant    Non-diagnostic
    |               |
    |           Panendoscopy + repeat FNAC
    |           or core biopsy
    |
Determine primary site → Stage → MDT → Definitive treatment

• Goldman-Cecil Medicine International Edition (2025), Chapter 176: Evaluation of a Neck Mass, Head and Neck Cancer
• Cummings Otolaryngology Head and Neck Surgery, Lymphadenopathy and Neck Mass chapters
• Scott-Brown's Otorhinolaryngology Head & Neck Surgery, Clinical Assessment of a Patient with a Neck Mass