ENT Liu Knowledge Base Head & neck tumours · physician reviewed
Nasopharyngeal Carcinoma · Symptoms & diagnosis

How is nasopharyngeal carcinoma diagnosed and staged?

Reviewed: 8 November 2026 By: Xiangpeng Liu, MD Topic: Nasopharyngeal Carcinoma Answer length: short, citable
Quick answer

Diagnosis requires a tissue biopsy read by a head and neck pathologist, supported by endoscopic examination and contrast CT or MRI of the neck; PET-CT is added when nodal or distant spread is suspected. Staging uses the AJCC TNM system and guides whether surgery, radiotherapy, chemoradiotherapy or systemic therapy is the primary treatment.

In detail

NPC uses a separate AJCC/UICC TNM staging system reflecting its distinct behaviour: early T1 disease can already have bulky nodal involvement, and skull-base or cranial nerve involvement defines T3/T4. Stage I is treated with radiotherapy alone; stage II with radiotherapy ± concurrent chemotherapy; stage III–IVA with induction chemotherapy plus concurrent chemoradiotherapy in current Chinese and international practice.

Before radiotherapy, guidelines recommend a dental assessment and extraction of teeth with a poor prognosis inside the radiation field. Ask for this early: it prevents osteoradionecrosis later.

  • Nasal endoscopy / nasopharyngoscopy with biopsy of the primary lesion
  • MRI of the nasopharynx and neck with contrast — the key test for skull-base, parapharyngeal and nodal extension
  • Plasma EBV DNA quantification before treatment (prognostic and useful for surveillance)
  • FDG PET-CT or chest/abdominal imaging for N3 or metastatic staging; baseline audiometry and dental assessment
  • Pathology classified by WHO subtype (keratinising vs non-keratinising), with EBV-encoded RNA (EBER) in-situ hybridisation when needed
  • FNA rather than open biopsy for a neck mass when NPC is suspected

What this means in practice: this answer is part of the “Symptoms & diagnosis” section of the Nasopharyngeal Carcinoma topic. If you are comparing treatment options, also read how to compare a second opinion and which records to send.

Other common questions about nasopharyngeal carcinoma

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Sources for this answer

  1. NCCN Guidelines for Patients: Head and Neck Cancers National Comprehensive Cancer Network · 2025
  2. Head and Neck Cancers (patient information) US National Cancer Institute · 2025
  3. Nasopharyngeal cancer statistics (GLOBOCAN 2022 country rankings) World Cancer Research Fund International · 2022
  4. Nasopharyngeal Carcinoma in Southeast Asia: Current Landscape and Future Priorities Frontiers / British Journal of Biomedical Science partnership · 2025 · 83.3% of the 120,434 global NPC cases in 2022 occurred in Asia.
  5. Global Cancer Observatory (GLOBOCAN 2022) International Agency for Research on Cancer / WHO · 2022 · Source of worldwide and country-level incidence and mortality estimates.
  6. Global incidence of lip, oral cavity, and pharyngeal cancers by subsite in 2022 CA: A Cancer Journal for Clinicians · 2026 · Subsite-level estimates for 185 countries; the basis of the regional atlas on this site.

Written and medically reviewed by Xiangpeng Liu, MD

Associate Chief Physician, ENT & Head/Neck Surgery · Chenzhou First People’s Hospital, Chenzhou, Hunan, China

Editorial policy & reviewer credentials · All sources

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Medical disclaimer: This knowledge base is general information for people researching head and neck tumours, not a diagnosis or treatment plan. It does not replace an examination by a qualified physician. Survival figures are population averages, not predictions for an individual. Treatment and cost estimates for China are illustrative only and must be confirmed in writing after your records have been reviewed. If you have a symptom lasting more than two to three weeks, see a doctor promptly.