About This Page
This is a clinician-written, evidence-based guide aligned to the MCC Examination Objectives. It is structured by clinical presentation — the way the MCCQE tests and the way patients actually present. Management reflects current Canadian guidelines (CMA, CFPC, CPS). Always cross-reference with institutional protocols and clinical judgment.
The Bottom Line
- A persistent adult neck mass should be considered malignant until proven otherwise, especially if firm, fixed, enlarging, or present >2-3 weeks
- History must assess duration, infection symptoms, B symptoms, smoking/alcohol, HPV risk, dysphagia, hoarseness, otalgia, thyroid symptoms, and travel/TB exposure
- Examination includes full head and neck exam: oral cavity, oropharynx, nasopharynx when available, thyroid, salivary glands, skin, and all nodal levels
- FNA is preferred over open biopsy for suspicious neck masses; open biopsy can compromise cancer surgery and staging
- Children often have reactive nodes, but supraclavicular nodes, persistent enlargement, systemic symptoms, or hard/fixed nodes need urgent work-up
Approach to the Presentation
A neck mass is a classic MCCQE1 presentation because the differential spans infection, congenital lesions, thyroid disease, salivary disease, lymphoma, and metastatic malignancy. Age matters: children commonly have reactive lymphadenopathy or congenital cysts, while an unexplained adult neck mass is malignant until proven otherwise. Determine duration, growth rate, pain, fever, dental/ENT infection, cat exposure, TB risk, travel, immunosuppression, B symptoms, smoking, alcohol, HPV risk, dysphagia, odynophagia, hoarseness, unilateral otalgia, nasal obstruction, epistaxis, and thyroid symptoms. Examine location, size, tenderness, mobility, consistency, overlying skin, thyroid movement with swallowing, oral/oropharyngeal mucosa, tonsils, salivary glands, scalp/skin, and hepatosplenomegaly.
Differential Diagnosis
| diagnosis | likelihood | key features | distinguishing test |
|---|---|---|---|
| Metastatic Head and Neck Squamous Cell Carcinoma | must-not-miss | Adult persistent firm neck node, smoking/alcohol or HPV risk, dysphagia, odynophagia, hoarseness, unilateral otalgia, weight loss; primary may be occult or oropharyngeal | ENT flexible nasolaryngoscopy + ultrasound-guided FNA/core biopsy ± CT/MRI neck |
| Lymphoma | must-not-miss | Rubbery painless lymphadenopathy, B symptoms, pruritus, fatigue, generalized nodes, hepatosplenomegaly | CBC, LDH, imaging; excisional/core biopsy for architecture when lymphoma suspected |
| Thyroid Cancer / Suspicious Thyroid Nodule | must-not-miss | Thyroid nodule, hoarseness, radiation exposure, family history, cervical nodes, hard/fixed nodule, rapid growth | TSH + thyroid ultrasound risk stratification + FNA based on sonographic criteria |
| Deep Neck Space Infection / Abscess | must-not-miss | Fever, toxic appearance, neck swelling, trismus, dysphagia, drooling, odynophagia, dental infection, limited neck movement | CT neck with IV contrast after airway assessment |
| Reactive Viral/Bacterial Lymphadenopathy | common | Tender mobile nodes with recent URTI, pharyngitis, dental/skin infection; improves over days-weeks | Clinical follow-up; investigate if persistent, enlarging, atypical, or systemic features |
| Thyroglossal Duct Cyst | common | Midline neck mass that moves with swallowing and tongue protrusion; may become infected | Ultrasound confirming thyroid tissue presence; ENT referral for Sistrunk procedure if indicated |
| Branchial Cleft Cyst | common | Lateral neck mass, often anterior to sternocleidomastoid, may enlarge after URTI; classically younger patient but new adult lateral cystic mass can be HPV malignancy | Ultrasound/CT + FNA; caution in adults |
| Thyroid Goitre / Benign Thyroid Nodule | common | Anterior neck swelling moving with swallowing, compressive symptoms possible, hyper/hypothyroid symptoms may be present | TSH + thyroid ultrasound ± FNA depending on ultrasound features/size |
| Salivary Gland Disease | common | Parotid/submandibular swelling, pain with meals if sialolithiasis, dry mouth/eyes, facial nerve weakness if malignant parotid lesion | Ultrasound or CT; FNA for persistent mass |
| Infectious Granulomatous Lymphadenitis | less common | TB exposure, travel, night sweats, chronic nodes; cat scratch disease with tender regional nodes after cat exposure; HIV risk | TB testing, HIV test, serology/culture/biopsy guided by exposure |
| Lipoma / Benign Soft Tissue Mass | less common | Soft, mobile, slow-growing, painless subcutaneous mass; no systemic symptoms | Clinical ± ultrasound if uncertain or enlarging |
| Congenital Vascular / Lymphatic Malformation | rare | Present since childhood or fluctuates with infection/position; soft compressible mass; may transilluminate | Ultrasound/MRI and specialist referral |
Red Flags & Key History
Symptoms
Adult neck mass persisting >2-3 weeks without clear infection — malignancy until proven otherwise
Dysphagia, odynophagia, hoarseness, unilateral otalgia, haemoptysis, weight loss — head and neck cancer features
B symptoms: fever, drenching night sweats, weight loss — lymphoma/TB/malignancy
Rapidly progressive swelling with fever, trismus, drooling, or breathing difficulty — deep neck infection/airway risk
Smoking, heavy alcohol use, HPV exposure risk, prior radiation, or family thyroid cancer history
Painful tender node after URTI or dental infection — reactive/infectious more likely
Mass enlarges with meals — salivary obstruction
Hyperthyroid or hypothyroid symptoms — thyroid disease clue
Signs
Hard, fixed, matted, or supraclavicular node — malignancy concern
Firm thyroid nodule with vocal cord symptoms or cervical nodes — thyroid cancer concern
Cranial nerve deficit or facial nerve weakness with parotid mass — malignancy/skull base involvement
Hepatosplenomegaly or generalized lymphadenopathy — lymphoma/systemic disease
Midline mass moving with tongue protrusion — thyroglossal duct cyst
Fluctuant tender mass with overlying erythema — abscess or suppurative lymphadenitis
Approach to Investigation
First-line
Full head and neck examinationInspect oral cavity, oropharynx, tonsils, teeth, nasal cavity, ears, scalp/skin, thyroid, salivary glands, cranial nerves, and all cervical nodal levels
CBC ± inflammatory markersIf infection, lymphoma, systemic illness, or unexplained persistent lymphadenopathy is suspected
TSHInitial test for thyroid mass/goitre; guides whether radionuclide scan is needed for hyperfunctioning nodules
Ultrasound neck/thyroidUseful for thyroid nodules, salivary masses, cystic vs solid lesions, nodal characterization, and guiding FNA
Second-line
Fine needle aspiration / core biopsyPreferred initial tissue diagnosis for suspicious neck mass; avoid open biopsy until specialist evaluation
CT neck with IV contrastFor suspected malignancy, deep neck infection, large/complex mass, airway symptoms, or preoperative mapping
Infectious testingGuided by exposure: throat testing, dental source evaluation, TB testing, HIV, EBV/CMV, Bartonella, toxoplasmosis, or cultures
Specialist
ENT flexible nasolaryngoscopyFor adult persistent neck mass, suspected head and neck cancer, hoarseness, dysphagia, unilateral otalgia, or cystic lateral neck mass in adult
Cancer pathway referralUrgent referral for high-risk adult neck mass, suspicious thyroid nodule with nodes/hoarseness, or FNA suggesting malignancy
Excisional biopsyOften required when lymphoma is suspected and FNA/core is inadequate for architecture and immunophenotyping
Management Principles
MCC Objective 63 + Cancer Care Ontario neck mass pathways + Choosing Wisely Canada otolaryngology recommendations1
Adult persistent or suspicious mass
- Treat as malignant until proven otherwise if persistent, firm/fixed, enlarging, supraclavicular, or associated with red flags
- Arrange ultrasound-guided FNA/core biopsy and ENT referral; do not perform open biopsy before FNA/specialist assessment
- ENT flexible nasolaryngoscopy is needed to search for mucosal primary cancer
2
Likely reactive/infectious nodes
- Treat clear bacterial source when present and arrange follow-up to ensure resolution
- Avoid repeated empiric antibiotics for an unexplained persistent adult neck mass
- Investigate if node persists, enlarges, is atypical, supraclavicular, generalized, or associated with systemic symptoms
3
Thyroid and salivary masses
- Thyroid nodule: TSH + ultrasound risk stratification; FNA based on sonographic features and size
- Hoarseness with thyroid mass requires vocal cord assessment and urgent specialist review
- Salivary mass: ultrasound or CT and FNA if persistent; facial nerve weakness is a malignancy red flag
4
Congenital and paediatric masses
- Thyroglossal duct cyst: confirm normally located thyroid tissue before surgery; ENT referral for recurrent/infected lesions
- Branchial cleft cyst: ENT referral; in adults, lateral cystic neck mass can represent HPV-related nodal metastasis
- Children: observe clearly reactive nodes with follow-up, but investigate supraclavicular, hard/fixed, persistent, or systemic presentations
5
Airway or deep infection
- Fever, trismus, drooling, dyspnea, toxic appearance, or rapidly progressive swelling requires urgent ED/ENT assessment
- Secure airway if threatened, start IV antibiotics, and obtain CT neck with contrast when safe
Complications & Pitfalls
- Open biopsy first: Choosing Wisely Canada advises considering FNA before open biopsy/excision of a neck mass.
- Adult “branchial cyst” trap: A new lateral cystic neck mass in an adult may be HPV-related metastatic oropharyngeal cancer.
- Repeated antibiotics: Persistent adult neck mass should not be repeatedly treated as infection without tissue diagnosis or ENT assessment.
- Missing thyroid red flags: Hoarseness, hard nodule, cervical nodes, radiation history, and rapid growth are concerning.
- Airway delay: Deep neck infection can progress quickly; trismus, drooling, and respiratory symptoms require urgent escalation.
MCCQE1 Exam Tips
- 1Persistent adult neck mass = malignancy until proven otherwise. The next best step is ENT assessment with FNA/imaging, not reassurance
- 2Do not perform open biopsy before FNA has been considered — this is a classic Choosing Wisely Canada point
- 3Midline mass moving with tongue protrusion = thyroglossal duct cyst
- 4Lateral neck mass in a young person may be branchial cleft cyst, but in an adult it can be cystic HPV-related nodal metastasis
- 5Neck mass + hoarseness or unilateral otalgia with normal ear exam = head and neck cancer clue
- 6Thyroid nodule initial work-up: TSH and ultrasound; FNA depends on sonographic risk pattern and size
- 7Supraclavicular nodes are always concerning and need investigation
- 8Fever + trismus + drooling + neck swelling = deep neck infection and airway risk
practicetest your knowledge on neck mass / lumpApply what you've learnt with MCCQE1-style questions from the iatroX Q-Bank — ent & ophthalmologic and beyond.
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