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