Orbital pseudotumor

Discussion:

Orbital pseudotumor is an idiopathic inflammatory condition that most commonly involves the extraocular muscles. Less commonly there is inflammatory change involving the uvea, sclera, lacrimal gland and retrobulbar soft tissues.

The condition has been associated with many wider inflammatory and autoimmune conditions including systemic lupus erythematosus (SLE).

It may involve an isolated or multiple extra-ocular muscles.  Additional inflammation can be seen in surrounding tissues, including the lacrimal gland ( as in this case ). It can appear as an infiltrative mass and that extends outside of the orbit via superior or inferior orbital fissures.

The patient made a prompt and good response to steriods.  Following up imaging is intended.

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