Laryngeal Cancer Diagnosis: From Laryngoscopy to Biopsy and Imaging

Diagnosing laryngeal cancer involves a stepwise approach combining clinical evaluation, endoscopic visualization, tissue sampling, and imaging to determine extent and guide treatment.

Diagnostic Steps

1. Medical History and Physical Examination

• Symptom assessment: hoarseness, dysphagia, odynophagia, otalgia, neck mass, weight loss
• Risk factors: tobacco, alcohol, HPV, occupational exposures
• Neck palpation for lymphadenopathy

2. Laryngoscopy (Direct Visualization)

• Flexible nasopharyngolaryngoscopy (office): First-line; evaluates vocal cord mobility, lesion appearance, airway patency.
• Rigid laryngoscopy (OR): Better visualization, allows biopsy under general anesthesia.
• Stroboscopy: Assesses mucosal wave for subtle lesions.

3. Biopsy (Definitive Diagnosis)

• Incisional biopsy: During rigid laryngoscopy; samples lesion for histopathology.
• Fine-needle aspiration (FNA): For neck nodes; ultrasound-guided.
• HPV testing (p16 immunohistochemistry) on biopsy specimen for oropharyngeal cancers.

4. Imaging for Staging

• CT neck/chest with contrast: Primary tumor extent, nodal metastases, lung mets.
• MRI: Superior soft tissue contrast for cartilage invasion, pre-epiglottic/paraglottic space, perineural spread.
• PET-CT: Detects distant metastases, unknown primaries, treatment response.

5. Biomarker and Molecular Testing

HPV/p16 status, EGFR, TP53, NOTCH1 mutations may inform prognosis and targeted therapy eligibility.

6. Additional Procedures

• Bronchoscopy/esophagoscopy: If tumor involves trachea or esophagus (T4).
• Examination under anesthesia (EUA): Comprehensive mapping of tumor extent.

7. Multidisciplinary Tumor Board

Otolaryngologists, radiation/medical oncologists, radiologists, pathologists, speech-language pathologists, and nutritionists collaborate to formulate individualized treatment plans.

Staging (AJCC 8th Edition)

Based on T (tumor), N (nodes), M (metastasis); determines treatment modality (surgery, radiation, chemoradiation, immunotherapy) and prognosis.