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Health condition · Clinically reviewed

Jaw tumours and cysts, from dental cysts to ameloblastoma - the modern approach.

Most jaw lesions are benign and treatable. The right diagnosis - and the right team - makes the difference between a small day-case procedure and a major reconstruction.

Jump to treatment
A radiographer guides a patient onto the bed of an advanced 3 Tesla MRI scanner in a London imaging suite

Why trust this guide

  • 01

    Clinically reviewed

    Written by our editorial team and reviewed by a registered UK clinician before publication.

  • 02

    Sourced from guidance

    Checked against BAOMS, BSOMP, NICE and peer-reviewed sources you can see at the end.

  • 03

    Current for 2026

    Reflects modern UK practice including BRAF-targeted therapy for ameloblastoma and denosumab for giant cell lesions.

Key facts

Jaw tumours and cysts at a glance.

A quick orientation to the main lesion families, how they present and the shape of treatment in UK maxillofacial practice.

  • What they are

    A wide family of cysts and tumours arising in the maxilla and mandible, from dental (odontogenic) tissue and non-odontogenic bone.

  • How they present

    Often silent and picked up on a routine dental radiograph, or with jaw swelling, tooth mobility, numbness or, rarely, a pathological fracture.

  • The big four cysts

    Dentigerous, odontogenic keratocyst (OKC), lateral periodontal and nasopalatine duct - each with a distinct radiographic and behavioural pattern.

  • Ameloblastoma

    The most common benign odontogenic tumour - locally aggressive, and often carries a targetable BRAF V600E mutation.

  • Malignant lesions

    Include oral SCC invading bone, osteosarcoma, Ewing sarcoma, metastases (breast, lung, kidney, prostate), lymphoma and myeloma.

  • MRONJ and ORN

    Medication-related and radiation-induced osteonecrosis are important non-neoplastic mimics that need specialist care.

The lesion families

Six broad groups, one framework.

Cysts, benign odontogenic tumours, benign non-odontogenic bone lesions, malignancy, medication-related osteonecrosis and radiation-induced osteonecrosis - each with its own path.

  • Odontogenic and non-odontogenic cysts

    Dentigerous cysts (around impacted teeth - see /conditions/impacted-wisdom-teeth/), odontogenic keratocysts (with a Gorlin syndrome link), lateral periodontal, glandular odontogenic and the nasopalatine duct cyst.

  • Benign odontogenic tumours

    Ameloblastoma (locally aggressive, often BRAF V600E-mutant), odontoma, ameloblastic fibroma, odontogenic myxoma and cementoblastoma.

  • Benign non-odontogenic bone lesions

    Fibrous dysplasia (see /conditions/mccune-albright-syndrome/), ossifying fibroma, cherubism (SH3BP2), central giant cell granuloma, Langerhans cell histiocytosis and brown tumour of hyperparathyroidism (see /conditions/hyperparathyroidism/).

  • Malignant tumours

    Oral squamous cell carcinoma invading bone (see /conditions/head-and-neck-cancer/), osteosarcoma, Ewing sarcoma, chondrosarcoma, metastases (breast, lung, kidney, prostate), lymphoma, multiple myeloma and salivary gland tumours. Specialist commissioned.

  • MRONJ - medication-related

    Osteonecrosis of the jaw related to bisphosphonates and denosumab (see /treatments/denosumab-osteoporosis-clinic/) - preventable with good pre-treatment dental care. Specialist commissioned.

  • ORN - radiation-induced

    Osteonecrosis after head and neck radiotherapy - managed with conservative care, hyperbaric oxygen in selected cases and specialist maxillofacial surgery. Specialist commissioned.

How the diagnosis is made

From dental radiograph to a clear plan.

The steps a UK dentist, maxillofacial surgeon or head and neck team will normally follow, in order - so you know what to expect and why.

  1. 01

    Assessing

    History and red flags

    Duration, pain, numbness, medication history (bisphosphonates, denosumab), prior head and neck radiotherapy and family history of jaw lesions.

  2. 02

    Assessing

    Dental and oral examination

    A structured look at tooth vitality, mucosal changes, swelling, expansion of buccal or lingual cortex and any facial asymmetry.

  3. 03

    Assessing

    Orthopantomogram and CBCT

    An OPG gives the overview; cone-beam CT defines borders, cortical breach and relationship to the inferior alveolar nerve. Specialist commissioned dental radiology.

  4. 04

    Confirming

    MRI or CT of the jaws

    Cross-sectional imaging for large, aggressive or possibly malignant lesions - and for surgical planning. Specialist commissioned (see /treatments/private-mri-scan/).

  5. 05

    Confirming

    Biopsy and histopathology

    Incisional or fine-needle biopsy under specialist maxillofacial care, with histopathology to confirm the tissue diagnosis (see /treatments/histopathology/). Specialist commissioned.

  6. 06

    Planning

    Genetic testing where relevant

    Selective testing for Gorlin syndrome (PTCH1) in multiple OKCs, cherubism (SH3BP2) and other syndromic lesions. Specialist commissioned.

  7. 07

    Planning

    MDT discussion

    Every aggressive or malignant lesion is discussed at a specialist oral maxillofacial or head and neck MDT before treatment. Specialist commissioned.

Typical timeline: from first radiograph to MDT plan in a few weeks for benign disease, faster for suspected cancer.

Symptoms

What jaw lesions actually feel like.

Many are silent and found on imaging. When there are symptoms, these are the classic patterns - and the features that mean it is time to escalate.

  • Incidental radiographic finding

    Many cysts and small tumours are picked up on a routine dental OPG with no symptoms at all.

  • Jaw swelling

    A slowly enlarging painless swelling of the mandible or maxilla is the classic presentation of a cyst or benign tumour.

  • Tooth mobility or displacement

    Adjacent teeth may loosen, tilt or drift as a lesion expands and remodels alveolar bone.

  • Numbness of the lower lip or chin

    Inferior alveolar nerve involvement suggests a large or aggressive lesion and warrants urgent specialist review.

  • Facial asymmetry

    Cortical expansion, particularly of the mandibular body or angle, can be visible or palpable through the skin.

  • Trismus

    Reduced mouth opening can point to lesions of the ramus or coronoid, or to malignant infiltration of surrounding muscle.

  • Pathological fracture

    A fracture through weakened bone after minimal trauma is uncommon but points to a substantial underlying lesion.

  • Red flag - non-healing socket

    An extraction socket that refuses to heal, especially on bisphosphonates or after radiotherapy, may be MRONJ or ORN.

Treatment

How jaw lesions are treated in the UK.

From observation and simple enucleation through to segmental resection, free flap reconstruction and targeted systemic therapy - matched to the diagnosis and the patient.

  • Observation

    Small, asymptomatic lesions with a clear benign diagnosis can be monitored with serial imaging under specialist maxillofacial care.

  • Enucleation and curettage

    The workhorse for most odontogenic cysts and many benign tumours - the lesion is shelled out and the bony cavity curetted.

  • Marsupialisation

    For very large cysts or lesions close to the inferior alveolar nerve - decompression first, then definitive enucleation later. Specialist.

  • Segmental resection

    For ameloblastoma, aggressive OKCs and malignant tumours - a margin of healthy bone is taken to reduce recurrence. Specialist commissioned.

  • Microvascular free flap reconstruction

    Fibula, iliac crest or scapula free flaps restore continuity and function after major mandibular resection. Specialist commissioned (see /treatments/microvascular-free-flap/).

  • BRAF and MEK inhibitors

    Targeted therapy (for example dabrafenib) for BRAF V600E-mutant ameloblastoma - increasingly used in a neoadjuvant setting. Specialist commissioned (see /treatments/dabrafenib-ameloblastoma-clinic/).

  • Denosumab for giant cell lesions

    A RANKL inhibitor that can shrink central giant cell granuloma and giant cell tumour of bone before or instead of resection. Specialist commissioned (see /treatments/denosumab-cgcg-clinic/).

  • Radiotherapy and systemic therapy

    Chemoradiotherapy for oral SCC and sarcomas, and systemic therapy for lymphoma, myeloma and metastatic disease. Specialist commissioned.

What this guide is based on

The sources behind every claim on this page.

UK national guidance, specialist society standards and the WHO tumour classification, current at the time of last review.

Key references

Guidelines and standards we relied on.

A quiet reminder

This guide is for information, not medical advice.

Your dentist, GP or maxillofacial surgeon knows your history and imaging and can tell you which parts apply to you. If in doubt, get seen.

  • BAOMS. Standards and clinical guidance for oral and maxillofacial surgery.

  • British Society of Oral and Maxillofacial Pathology (BSOMP). Diagnostic guidance for jaw lesions.

  • WHO Classification of Head and Neck Tumours, 5th edition.

  • NICE. Cancer of the upper aerodigestive tract - assessment and management (NG36).

  • SDCEP. Oral health management of patients at risk of medication-related osteonecrosis of the jaw.

Red flags

When a jaw lesion needs urgent attention.

Most jaw cysts are safely managed by a local maxillofacial team. These are the features that push the pace of investigation.

  • Rapidly enlarging swelling

    Fast growth over weeks, rather than months, is unusual for a cyst and raises concern for malignancy or infection.

  • Numbness of the lower lip or chin

    A new inferior alveolar nerve deficit should be treated as a red flag for aggressive or malignant disease until proven otherwise.

  • Non-healing extraction socket

    Especially in patients on bisphosphonates or denosumab, or after head and neck radiotherapy - consider MRONJ and ORN early.

  • Ulcerated oral mucosa

    A persistent oral ulcer overlying a jaw swelling can point to oral squamous cell carcinoma invading bone (see /conditions/head-and-neck-cancer/).

  • Multiple keratocysts

    More than one OKC, or an OKC in a young patient, should trigger assessment for Gorlin syndrome (naevoid basal cell carcinoma syndrome).

  • Symmetrical multilocular lesions

    Bilateral multilocular expansion of the mandibular angle in a child is classic for cherubism and needs a genetics referral.

  • Pathological fracture

    A mandibular fracture after minimal trauma - always assume a significant underlying lesion until imaging says otherwise.

  • Systemic B symptoms

    Night sweats, weight loss and fever alongside a jaw lesion suggest lymphoma or myeloma and warrant urgent haematology input.

  • Known primary cancer

    In patients with breast, lung, kidney, prostate or thyroid cancer, a new jaw lesion may be a bony metastasis.

Living with it

A treatable group of conditions, with a clear pathway.

Four things that make the biggest difference over time - staying on follow-up, keeping the dental team involved, flagging bone-modifying drugs and giving recovery its due.

A quiet reminder

Recurrence is the enemy of complacency.

OKCs and ameloblastomas can return years after apparent cure - the schedule of imaging matters as much as the operation.

  1. 01 Follow-up

    Stay on the review schedule

    Many jaw lesions - especially OKCs and ameloblastomas - can recur years later. Long-term radiographic follow-up matters.

  2. 02 Dental

    Keep your dentist in the loop

    Regular dental care, gum health and prompt attention to any new swelling or numbness is the earliest safety net.

  3. 03 Medication

    Flag bone-modifying drugs early

    If you take bisphosphonates or denosumab, tell any dentist or maxillofacial surgeon before extractions or implants to reduce MRONJ risk.

  4. 04 Recovery

    Give reconstruction time

    After a resection and free flap, function - speech, chewing, sensation - improves steadily over 12 months with rehabilitation.

Frequently asked

Everything we get asked about jaw tumours and cysts.

Quick answers on ameloblastoma, keratocysts, MRONJ, osteoradionecrosis and jaw reconstruction.

  • Are jaw cysts always serious?

    Most jaw cysts are benign and treatable with straightforward surgery. The odontogenic keratocyst is the exception - it behaves more aggressively than its appearance suggests, has a real recurrence rate, and multiple keratocysts can point to Gorlin syndrome, which is why every jaw cyst deserves a proper radiographic and histological diagnosis.

  • What is ameloblastoma and how is it treated?

    Ameloblastoma is the most common benign odontogenic tumour of the jaw. It is locally aggressive, often multilocular on imaging, and recurs if it is only shelled out. Standard treatment is segmental resection with clear margins, sometimes with free flap reconstruction. Many ameloblastomas carry a BRAF V600E mutation, and BRAF and MEK inhibitors like dabrafenib are increasingly used in specialist clinics for advanced or unresectable disease.

  • What is MRONJ and who is at risk?

    MRONJ - medication-related osteonecrosis of the jaw - is exposed, non-healing jawbone in a patient taking bone-modifying drugs, most often bisphosphonates or denosumab, without previous radiotherapy. Risk is highest after dental extractions or trauma, and rises with intravenous, cancer-dose regimens. Prevention centres on a dental assessment before starting these drugs, careful oral hygiene, and conservative management of any exposed bone by a maxillofacial team.

  • How is radiation-induced osteonecrosis different from MRONJ?

    Osteoradionecrosis (ORN) is non-healing bone after head and neck radiotherapy, typically at doses over 60 Gy. It shares the theme of impaired bone healing, but the biology, risk factors and treatment differ. Both need specialist maxillofacial care and both are strong reasons to have any dental work planned carefully around your treatment.

  • Do I need genetic testing?

    Only in specific situations - multiple OKCs or an OKC in a young patient (Gorlin syndrome / PTCH1), classical cherubism (SH3BP2), or a syndromic pattern with other bony or systemic features. Genetic testing is arranged through a specialist commissioned clinical genetics service, not as a routine part of every jaw lesion work-up.

  • What does jaw reconstruction involve?

    For large resections, the mandible or maxilla is rebuilt with a microvascular free flap - most often bone from the fibula, iliac crest or scapula with its own blood supply, transferred and plumbed into vessels in the neck. Recovery takes months rather than weeks; speech, chewing and cosmetic outcomes are usually good, and dental implants can be placed later to restore the bite.

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