ENT Liu Knowledge Base Head & neck tumours · physician reviewed
Salivary Gland Tumours · Symptoms & diagnosis

How is salivary gland tumours diagnosed and staged?

Reviewed: 8 November 2026 By: Xiangpeng Liu, MD Topic: Salivary Gland Tumours 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

AJCC TNM staging for major salivary gland cancers uses tumour size, extraparenchymal extension, facial nerve involvement, nodal metastases and distant metastasis. Unlike squamous cell carcinoma of the oral cavity, grade and histological subtype are often more important for adjuvant treatment decisions than T category alone.

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.

  • Clinical examination including facial nerve function and bimanual palpation of the oral cavity
  • High-resolution ultrasound plus contrast MRI (best for deep-lobe, perineural and skull-base extension) or CT when bone detail is needed
  • Ultrasound-guided core-needle biopsy or FNA reported by a head and neck cytopathologist
  • Assessment of facial nerve involvement, skin/ bone fixation and cervical nodes
  • Chest imaging and PET-CT for high-grade or advanced malignant histology
  • Multidisciplinary review, because the operation differs markedly between benign and malignant pathology

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

Other common questions about salivary gland tumours

See all 14 questions in this topic →

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. 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.
  4. Global Cancer Observatory (GLOBOCAN 2022) International Agency for Research on Cancer / WHO · 2022 · Source of worldwide and country-level incidence and mortality estimates.
  5. Nivolumab Risk Management Plan — epidemiological characteristics of SCCHN (GLOBOCAN 2022 summary) European Medicines Agency · 2025 · Reports the combined 947,211 head and neck cancer cases in 2022 and regional ASRs.
  6. NCCN Guidelines for Patients: Head and Neck Cancers National Comprehensive Cancer Network · 2025

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.