Osteoma

Medical condition

Osteoma

Osteoma of external auditory meatus
Specialty| Oncology

An osteoma (plural osteomas or less commonly osteomata) is a new piece of bone usually growing on another piece of bone, typically the skull. It is a benign tumor.

When the bone tumor grows on other bone it is known as "homoplastic osteoma"; when it grows on other tissue it is called "heteroplastic osteoma".[1]

Osteoma represents the most common benign neoplasm of the nose and paranasal sinuses. The cause of osteomas is uncertain, but commonly accepted theories propose embryologic, traumatic, or infectious causes. Osteomas are also found in Gardner's syndrome. Larger craniofacial osteomas may cause facial pain, headache, and infection due to obstructed nasofrontal ducts. Often, craniofacial osteoma presents itself through ocular signs and symptoms (such as proptosis).[2]

## Variants

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* Osteoma cutis (also known as "Albright's hereditary osteodystrophy")
* Osteoid osteoma
* Fibro-osteoma
* Chondro-osteoma

* Osteoma of the frontal sinus seen on x-ray

* Osteoma of the frontal sinus on CT

* Osteoma

## See also

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* Osteosclerosis
* Familial adenomatous polyposis
* Exostosis
* Gardner syndrome
* Ganglion cyst

## References

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1. ^ "Head and Neck Osteoma". Penn Medicine. February 2, 2023.
2. ^ 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.

## External links

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* radio/498 at eMedicine \- Osteoid osteoma
* derm/301 at eMedicine \- Osteoma cutis
* Humapth #4724 (Pathology images)

Classification|

* ICD-10: D16
* ICD-9-CM: 213.0
* ICD-O: 9180/0, 9191/0, 9200/0
* MeSH: D010016

|

* v
* t
* e

Tumours of bone and cartilage

Diaphysis|

* Multiple myeloma
* Epithelia
* Adamantinoma
* Primitive neuroectodermal tumor
* Ewing family
* Ewing sarcoma

Metaphysis|

| Osteoblast|

* Osteoid osteoma
* Osteoblastoma
* Osteoma/osteosarcoma

|

Chondroblast|

* Chondroma/ecchondroma/enchondroma
* Enchondromatosis
* Extraskeletal chondroma
* Chondrosarcoma
* Mesenchymal chondrosarcoma
* Myxoid chondrosarcoma
* Osteochondroma
* Osteochondromatosis
* Chondromyxoid fibroma

Fibrous|

* Ossifying fibroma
* Fibrosarcoma

Epiphysis|

| Chondroblast|

* Chondroblastoma

|

Myeloid|

* Giant-cell tumor of bone

Other|

| Notochord|

* Chordoma

|

* v
* t
* e

Skin cancer of nevi and melanomas

Melanoma|

* Mucosal melanoma
* Superficial spreading melanoma
* Nodular melanoma
* lentigo
* Lentigo maligna/Lentigo maligna melanoma
* Acral lentiginous melanoma
* Amelanotic melanoma
* Desmoplastic melanoma
* Melanoma with features of a Spitz nevus
* Melanoma with small nevus-like cells
* Polypoid melanoma
* Nevoid melanoma
* Melanocytic tumors of uncertain malignant potential

Nevus/
melanocytic nevus|

* Nevus of Ito/Nevus of Ota
* Spitz nevus
* Pigmented spindle cell nevus
* Halo nevus
* Pseudomelanoma

* Blue nevus
* of Jadassohn–Tièche
* Cellular
* Epithelioid
* Deep penetrating
* Amelanotic
* Malignant

* Congenital melanocytic nevus (Giant
* Medium-sized
* Small-sized)

* Balloon cell nevus
* Dysplastic nevus/Dysplastic nevus syndrome

* Acral nevus
* Becker's nevus
* Benign melanocytic nevus
* Nevus spilus
* Connective tissue nevus

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