Rapidly growing painful mandibular mass with sun-ray spiculation
27-year-old male
§Chief complaint
Painful, fast-growing swelling of the jaw with numb lower lip for 8 weeks
§Medical & dental history
- 01No previous radiotherapy, no retinoblastoma, no Paget's disease
- 02Teeth in the region became mobile over 6 weeks
§Clinical examination
- 01Hard, fixed, tender swelling 45 mm over the left mandibular body with obliterated sulcus
- 02Paraesthesia of the left lower lip (Vincent's sign)
- 0336 and 37 grade III mobile; mucosa ulcerated over the crest
- 04Level I-II lymph nodes not enlarged
§ figuresFigures (3)
Fig. 1osteosarcoma
“Osteosarcoma mechanism” · Du X, Wei H, Zhang B, Wang B, Li Z, Pang LK, Zhao R, Yao W. · CC BY 4.0 · Wikimedia Commons
Verified open-access images only, reproduced for education under their stated licences · no AI-generated or illustrative artwork · Osteosarcoma of the Jaw figures pending faculty review.
§Differential diagnosis
§Final diagnosis
Conventional osteoblastic osteosarcoma of the left mandible
Rapid growth, lip paraesthesia, symmetrical PDL widening and sun-ray periosteal new bone strongly suggest osteosarcoma; biopsy showing frankly malignant spindle cells producing osteoid confirms it.
§Investigations
- 01Incisional biopsy from the viable periphery, avoiding necrotic centre
- 02Serum ALP and LDH as baseline prognostic markers
- 03Staging CT chest for pulmonary metastases and whole-body bone scan/PET-CT
- 04Multidisciplinary sarcoma team referral
§Radiology
- 01OPG — ill-defined mixed lesion with sun-ray spiculation and symmetrical widening of the periodontal ligament space around 36/37
- 02CT — cortical destruction with aggressive periosteal reaction and a soft tissue mass
- 03MRI — marrow extension mapped for resection planning; no skip lesions
§Treatment plan
- 01Neoadjuvant chemotherapy per sarcoma protocol
- 02Radical segmental resection with wide margins
- 03Microvascular free fibula reconstruction; adjuvant chemotherapy based on necrosis rate
- 04Long-term oncological surveillance
§Surgical procedure
- 01Segmental mandibulectomy with 20 mm bony margins and en-bloc soft tissue cuff
- 02Frozen section of marrow margins
- 03Free fibula flap reconstruction with load-bearing plate
§Histopathology report
Pleomorphic spindle and polygonal cells with hyperchromatic nuclei and frequent mitoses directly producing lacy malignant osteoid and woven bone. Margins clear. Conventional osteoblastic osteosarcoma, high grade.
§Follow-up & outcome
- 01Adjuvant chemotherapy completed at 6 months
- 023-monthly clinical review with CT chest for 2 years, then 6-monthly
- 0336 months — no local recurrence or metastasis
Outcome: Disease-free at 3 years with a functional reconstructed mandible; dental implants planned.
§Discussion
- 01Jaw osteosarcoma presents about a decade later than long-bone osteosarcoma and metastasises less frequently, but local recurrence dominates prognosis.
- 02Adequate surgical margins are the single strongest prognostic factor; 5-year survival is roughly 50-70%.
- 03Symmetrical PDL widening is an early sign that can precede obvious bone destruction.
§Clinical pearls / learning points
- 01Numb lip with a fast-growing jaw swelling is malignancy until proven otherwise.
- 02Biopsy the periphery of the lesion, not the necrotic centre.
- 03Sun-ray spiculation and Codman triangle indicate aggressive periosteal reaction.
§Viva questions
What is Vincent's sign?
Paraesthesia or anaesthesia of the lower lip from involvement of the inferior alveolar nerve, suggesting malignancy or osteomyelitis.
What determines prognosis in jaw osteosarcoma?
Completeness of surgical resection margins, tumour grade and response to chemotherapy.
§MCQs
Q1Symmetrical widening of the periodontal ligament space is an early radiographic sign of:
Q2The definitive histological criterion for osteosarcoma is:
§ evidenceReferences & Evidence
Current Classification
WHO Classification of Head and Neck Tumours
5th Edition — Volume 9
WHO Classification of Tumours Editorial Board · 2022
The authoritative international classification of head and neck, odontogenic and salivary gland tumours. Current terminology on this site follows this edition.
Evidence summary
Highest level of evidence linked to this page: WHO / Official Classification.
- L1 · Classification — 2
- L3 · Systematic review — 1
- L6 · Textbook — 3
2 linked sources were published from 2024 onwards. Where guidance is limited or contested, rely on the higher-level sources above rather than this summary. Educational use only — not a substitute for clinical judgement.
Content last reviewed
September 2026
Evidence last reviewed
September 2026
Next scheduled review
September 2027
Review status
EVIDENCE REVIEWED
Search latest PubMed evidence
Last literature search: 7 September 2026
Current Classification
WHO Classification of Tumours Editorial Board. IARC / World Health Organization · 2022
The authoritative international classification of head and neck, odontogenic and salivary gland tumours. Current terminology on this site follows this edition.
IARC / WHO. IARC · 2022
Continuously updated online edition of the WHO head and neck tumour classification.
Systematic Reviews & Meta-Analyses
Zhang L, Guo Y, Sumita Y et al.. International journal of oral and maxillofacial surgery · 2026 · 55(1):10-19
Systematic review of chemotherapy and prognosis in jaw osteosarcoma.
Histopathology References
Barnes L. CRC Press · 2008
Detailed histopathological reference for head and neck diagnostic criteria.
Textbook References
Neville BW, Damm DD, Allen CM et al.. Elsevier · 2024
Standard reference textbook of oral and maxillofacial pathology used throughout this atlas.
Rajendran R, Sivapathasundharam B. Elsevier · 2020
Undergraduate and postgraduate oral pathology textbook widely used in BDS and FCPS curricula.
Additional sources cited on this page
- WHO Classification of Head and Neck Tumours, 5th edition, 2022.
- Fernandes R et al. Osteogenic sarcoma of the jaw. J Oral Maxillofac Surg.
§Similar cases
81 cases in the library