|Other names: Benign osteogenic tumors, unspecified and osteoma NOS. Not recommended: ivory exostosis, parosteal osteoma, torus palatines/mandibularis|
|Osteoma of external auditory meatus|
|Symptoms||None, pain, headache|
|Diagnostic method||Medical imaging: X-ray, CT scan, MRI|
Osteoma (plural: "osteomata" or "osteomas"), is a non-cancerous osteogenic bone tumor, a new piece of bone usually growing on another piece of bone, typically on the skull. An osteoma grows slowly so may give no symptoms or pain, headache, blocked paranasal sinuses or local swelling. It may present with sinusitis.
Medical imaging such as X-ray, CT scan and MRI show dense, clearly defined, round white tumors attached to bone. They can be left alone if not troubling, and surgically cut out if pressure symptoms. The surgery may be possible through the nose, without making a large cut.
It affects males and females equally. The true prevalence is not known but some reports quote up to 6.4%.[clarification needed] Findings of osteomata date back to ancient Egypt (664-332 BCE).
Signs and symptoms
Medical imaging such as X-ray, CT scan and MRI show dense, clearly defined, round white tumors attached to bone. They may be diagnosed when having medical imaging for another reason. Osteomas of the paranasal sinuses and skull base can be diagnosed using CT-scan without intravenous contrast, allowing its size and relation to nearby important structures to be assessed. A biopsy is not usually required.
They can be left alone if not troubling, and surgically cut out if pressure symptoms.
Findings of osteomata date back to ancient Egypt (664-332 BCE).
- WHO Classification of Tumours Editorial Board, ed. (2020). "Bone tumors". Soft Tissue and Bone Tumours: WHO Classification of Tumours. 3 (5th ed.). Lyon (France): International Agency for Research on Cancer. p. 391-393. ISBN 978-92-832-4503-2.
- "ICD-11 - ICD-11 for Mortality and Morbidity Statistics". icd.who.int. Retrieved 16 July 2021.
- "Osteoma". Stanford Medicine: Skull Base Surgery (in Gagana Samoa). Retrieved 15 July 2021.
- Michael S. Schwartz, MD; Dennis M. Crockett, MD. "Management of a Large Frontoethmoid Osteoma with Sinus Cranialization and Cranial Bone Graft Reconstruction". International Journal of Pediatric Otorhinolaryngology.
- Humapth #4724 (Pathology images)