Musculoskeletal System
The Common Vein Copyright 2007
Introduction
 Osteoma |
| 29107 44F one occiput occipital bone fx mass ossified dx osteoma neoplasm benign CTscan Davidoff MD |
Osteoma
Imaging findings
Size – usually less than 2 cm in size
Shape- looks like half a billiard ball
Position – Mist frequent in the frontal and ethmoid sinuses
Well-circumscribed, sharply-marginated round and
outer table of the skull
Seen in the auditory canals of swimmers and divers
Character – very dense lesions of dense compact bone
Associated findings – multiplicity – Gardners
Notes
Most common tumor of the paranasal sinuses
Benign tumor of membranous bone consisting of dense, compact bone
Complications –
- Rarely, large osteoma in the frontal or ethmoid region may displace globe forward and cause proptosis
- Obstruction of a sinus ostium may lead to infection or formation of a mucocele
- Very rarely, an osteoma may erode through the dura leading to cerebrospinal fluid rhinorrhea or intracranial infection
Gardner?s syndrome
Multiple osteoma of the mandible and maxilla, along with the frontal, sphenoid and ethmoid sinuses, rarely the long bones or phalanges
Cutaneous and soft tissue tumors
Association between colonic polyps with a predilection to malignant degeneration
Other Images
Learning Radiology.com
Bone Tumor.org
References
Gardners Syndrome – eMEdicine
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