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Related Experiment Videos

Orbital dermoids: features on CT.

R A Nugent1, J S Lapointe, J Rootman

  • 1Department of Radiology, University of British Columbia, Vancouver, Canada.

Radiology
|November 1, 1987
PubMed
Summary
This summary is machine-generated.

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Computed tomographic (CT) imaging of orbital dermoids reveals key features like calcified rims and bone scalloping. These findings aid in diagnosing these benign orbital tumors.

Area of Science:

  • Ophthalmology
  • Radiology
  • Pathology

Background:

  • Orbital dermoids are congenital tumors that can affect vision.
  • Accurate diagnosis relies on characteristic imaging findings.

Purpose of the Study:

  • To review and characterize the computed tomographic (CT) features of orbital dermoids.
  • To correlate CT findings with clinical and histological data.

Main Methods:

  • Retrospective review of CT scans from 17 patients with orbital dermoids.
  • Histological confirmation for 15 of the lesions.
  • Classification based on clinical and CT features (superficial vs. deep, extraconal location).

Main Results:

  • Most lesions were extraconal (16/17).

Related Experiment Videos

  • Seven lesions appeared cystic; six showed fat density.
  • A calcified rim was present in ten lesions.
  • Bone changes, including scalloping (11/17), thinning, or sclerosis, were observed.
  • Superficial dermoids showed fewer bone changes.

    • Conclusions:

    • Extraconal orbital lesions with bone thinning or notching suggest dermoid tumors.
    • The presence of a calcified rim increases diagnostic suspicion.
    • Fat density on CT is pathognomonic for orbital dermoids.