Subconjunctival fat prolapse

Case contributed by Pamela Boustros
Diagnosis probable

Presentation

Left lateral orbital mass.

Patient Data

Age: 70 years
Gender: Male

Left superolateral/ epibulbar region fat density lesion, posterior to the attachment of the rectus lateral muscle, medial to the lacrimal gland, and continuous with intraconal fat. 

The criteria of continuity with intraconal fat suggest subconjunctival fat prolapse.

Annotated image

Annotated image

Key images

Case Discussion

It is important to differentiate between subconjunctival fat prolapse and dermolipoma since they have different treatments. 

Similarities: both present as fatty mass at the superior-temporal epibulbar area.

Differences: 

- Subconjunctival fat prolapse: continuous with intraconal fat, male predominance.

- Dermolipoma:  no connection with intraconal fat, often crescent-shaped, female predominance.

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