CT scan may be helpful in the diagnosis of fibroma. Findings on CT suggestive of a particular fibroma depends on the type of the fibroma. Findings on CT scan of ossifying fibroma include a well-circumscribed lesion, intracortical osteolysis with a characteristic sclerotic band, and moderate cortical expansion. Findings on CT scan of non- ossifying fibroma include sharply demarcated, asymmetrical, cortically based lucencies with a thin sclerotic rim. Findings on CT scan of chondromyxoid fibroma include a mild cortical expansion and characteristic lack of mineralization within chondromyxoid fibroma. Findings on CT scan of cemento-ossifying fibroma include a well circumscribed masses which expand the underlying bone.

Findings on CT scan of ossifying fibroma includes the following:^[1][2][3]

• Seen as a well-circumscribed lesion
• Demonstrates evidence of intracortical osteolysis with a characteristic sclerotic band (osteoblastic rimming)
• Moderate cortical expansion

• Non-ossifying fibromas are typically sharply demarcated, asymmetrical, cortically based lucencies with a thin sclerotic rim.^[4]
• They often appear multiloculated.
• They are located in the metaphysis. However, as the patient ages, they seem to migrate away from the growth plate.
• They have no associated periosteal reaction, cortical breach or associated soft tissue mass.

• They usually manifest as diffuse, slightly hypoattenuating masses with poor, very slow contrast enhancement. Calcification and bilaterality are both uncommon.^[5][6][7]

• Tends to have soft tissue attenuation on unenhanced scans and show relatively homogenous intense background enhancement on contrast enhanced scans.^[8][9][10]
• Non-enhancing areas may be present corresponding to necrosis, myxoid degeneration, or haemorrhage within the tumor. A pedicular attachment may also be seen.

• On CT, cardiac fibromas are homogeneous soft-tissue masses that are usually sharply marginated, but also can be infiltrative. Dystrophic calcification is common.

• On computed tomography (CT), mild cortical expansion may be observed, and the lesions have a density greater than fluid throughout.^[11][12][13]
• CT scans also exhibit characteristic lack of mineralization within chondromyxoid fibromas.

• Cemento-ossifying fibromas are usually well circumscribed masses which expand the underlying bone.
• They are usually small, but can become large. This is particularly the case when they arise from the maxilla or paranasal sinuses because there is more room to expand.
• As they mature, they gradually develop increasing amounts of calcification/ossification as they mature.
• They usually expand the bone without cortical breach.
• Following administration of contrast, the soft tissue component usually enhances on CT.

• On CT scans, fibromas are usually of soft tissue density but may exhibit coarse peripheral or central calcification.^[14][15]

• They may distort the usually smooth uterine contour
• Enhancement pattern is variable

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