About This Page
This is a clinician-written, evidence-based summary aligned to the USMLE Step 2 CK Content Outline. It is intended for medical students preparing for USMLE Step 2 CK. Management reflects current ACC/AHA, USPSTF, and APA guidelines. Always cross-reference with UpToDate, institutional protocols, and clinical judgment.
The Bottom Line
- Adult neck mass should be considered malignant until proven otherwise, especially if firm, fixed, >1.5 cm, ulcerated, or present >=2 weeks without infectious explanation
- Laryngeal cancer red flags: persistent hoarseness, dysphagia, odynophagia, otalgia, hemoptysis, stridor, weight loss, tobacco/alcohol exposure
- Oropharyngeal SCC is increasingly HPV-associated; may present as a cystic neck mass in a younger patient with minimal throat symptoms
- Initial high-risk workup: targeted mucosal exam/flexible laryngoscopy, contrast CT or MRI neck, and FNA biopsy of neck mass
- Do not repeatedly prescribe antibiotics for an unexplained adult neck mass; prompt ENT referral is key
Overview
Head and neck squamous cell carcinoma arises from mucosal surfaces of the oral cavity, oropharynx, hypopharynx, larynx, and related upper aerodigestive tract sites. This page focuses on laryngeal and oropharyngeal SCC because they are high-yield for Step 2 CK. Traditional risk factors are tobacco and alcohol, which act synergistically. HPV-positive oropharyngeal cancer, especially HPV-16, often presents with metastatic cervical lymphadenopathy and has distinct epidemiology and prognosis.
Epidemiology
Head and neck cancers are more common in men and older adults, though HPV-associated oropharyngeal cancer often affects somewhat younger patients and may occur without heavy tobacco exposure. Risk factors include smoking, smokeless tobacco, alcohol, HPV infection, immunosuppression, prior radiation, poor oral hygiene, and occupational exposures. Laryngeal cancer often presents earlier with voice changes when the glottis is involved. A persistent adult neck mass is a major diagnostic trigger because metastatic SCC may be the first manifestation.
Clinical Features
Symptoms
Persistent hoarseness or voice change, especially >4 weeks
Dysphagia, odynophagia, globus sensation, chronic sore throat, or unilateral otalgia
Neck mass, often painless and persistent
Hemoptysis, weight loss, anorexia, or fatigue
Stridor, dyspnea, or airway compromise from laryngeal tumor
Cystic lateral neck mass in an adult can be HPV-positive metastatic SCC, not a benign branchial cleft cyst
Signs
Firm, fixed cervical lymph node >1.5 cm or ulcerated overlying skin is high-risk
Oral cavity or tonsillar asymmetry, ulcer, erythroplakia, leukoplakia, or bleeding lesion
Cranial neuropathies, tongue deviation, trismus, or referred otalgia suggest advanced disease
Hoarse voice, stridor, or neck tenderness may reflect laryngeal involvement
Normal oropharyngeal inspection does not exclude base-of-tongue or laryngeal tumor
Investigations
First-line
Full head and neck examInspect oral cavity, tonsils, base-of-tongue region as feasible, neck nodes, cranial nerves, and skin
Flexible nasopharyngolaryngoscopyKey ENT examination for persistent hoarseness, suspected laryngeal lesion, or high-risk neck mass
Fine-needle aspiration (FNA)Preferred initial tissue test for adult neck mass; avoid open biopsy before imaging and ENT evaluation
Second-line
CT neck with IV contrast or MRI neckRecommended for neck mass at increased risk for malignancy; defines primary tumor, nodal disease, and deep extension
HPV/p16 testingPerformed on oropharyngeal SCC tissue because HPV status affects staging and prognosis
Chest imagingAssess pulmonary metastases or synchronous lung cancer in tobacco-exposed patients
Specialist
Panendoscopy and directed biopsySpecialist evaluation when primary tumor not found or operative staging is required
PET/CTUsed for staging selected advanced disease, unknown primary, and post-treatment assessment
Multidisciplinary tumor boardENT/head and neck surgery, radiation oncology, medical oncology, speech/swallow therapy, nutrition, dental evaluation
1
Immediate priorities
- Airway symptoms such as stridor require urgent airway-capable ENT/anesthesia assessment
- Do not delay evaluation with repeated empiric antibiotics unless clear bacterial infection is present
- Smoking and alcohol cessation, nutrition assessment, dental evaluation, and speech/swallow baseline assessment
2
Diagnostic pathway
- Adult neck mass present >=2 weeks without clear infectious cause or uncertain duration = increased malignancy risk
- High-risk physical features: fixation, firm consistency, size >1.5 cm, or skin ulceration
- Order contrast CT/MRI and perform FNA; refer for targeted mucosal visualization
- Cystic neck mass in an adult still requires malignancy workup until diagnosis is secured
3
Treatment principles
- Early laryngeal cancer: transoral laser microsurgery or radiation may preserve voice depending on stage/site
- Advanced laryngeal cancer: surgery, radiation, and/or concurrent chemoradiation; total laryngectomy may be needed for airway or extensive disease
- HPV-positive oropharyngeal SCC: radiation with cisplatin-based chemotherapy or transoral robotic surgery with neck management depending on stage and anatomy
- Recurrent/metastatic disease: systemic therapy including platinum-based therapy, cetuximab, or immunotherapy depending on PD-L1 and prior treatment
4
Surveillance and rehabilitation
- Long-term surveillance for recurrence, second primaries, dysphagia, hypothyroidism after neck radiation, dental complications, and psychosocial needs
- Speech and swallowing rehabilitation is central, particularly after laryngeal treatment
Complications
- Airway obstruction: Laryngeal tumors can cause stridor and require emergency airway planning
- Dysphagia and aspiration: From tumor or treatment-related fibrosis
- Malnutrition: Pain and swallowing impairment can require enteral support
- Nodal metastasis: Common in oropharyngeal SCC; cystic nodes may occur with HPV-positive disease
- Second primary tumors: Tobacco/alcohol exposure increases risk in lung and upper aerodigestive tract
- Treatment toxicity: Xerostomia, hypothyroidism, osteoradionecrosis, voice loss, and fibrosis
USMLE Step 2 CK Exam Tips
- 1Adult neck mass = malignant until proven otherwise if persistent or unexplained
- 2Cystic neck mass in an adult is not automatically branchial cleft cyst — HPV-positive SCC can look cystic
- 3Persistent hoarseness >4 weeks, especially smoker, needs laryngoscopy
- 4Initial tissue diagnosis for neck mass is FNA, not open biopsy
- 5Workup of high-risk neck mass: contrast CT/MRI + FNA + mucosal visualization
- 6Unilateral otalgia with normal ear exam can be referred pain from oropharyngeal/laryngeal cancer
- 7Tobacco + alcohol synergistically increase SCC risk; HPV is key for oropharyngeal SCC
- 8Stridor in suspected laryngeal cancer is an airway emergency
practicetest your knowledge on head & neck cancer (squamous cell — laryngeal, oropharyngeal)Apply what you've learnt with USMLE Step 2 CK-style questions from the iatroX Q-Bank — ent and beyond.
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