Idiopathic orbital inflammatory syndrome (IOIS) Orbital pseudotumor Flashcards
1
Q
Why is this called a diagnosis of exclusion?
A
Symptoms can be similar to other conditions such as orbital cellulitis, dacryoadenitis or an orbital tumor. Want to rule those out by CT scan
Rule out inflammatory disease based on history
2
Q
What is it?
A
Acute inflammation of soft tissues in the orbit
Could be of the fat, CT, muscle (myositis), lacrimal gland (dacryoadenitis).
Could also extend into the globe- tenons, sclera, or uvea inflammation.
3
Q
Laterality
A
Unilateral in adults
Bilateral in children
4
Q
Symptoms
A
Eyelid swelling, redness, pain Red eye Bulging, displaced eye Double vision Pain on eye movement
- similar to orbital cellulitis
5
Q
Signs
A
Eyelid edema, tender and painful Conj chemosis and injection Proptosis Globe displacement Myositis if EOMs involved. Dacryoadenitis Posterior scleritis if sclera and tenons involved Uveitis
6
Q
Complications
A
Compression on the globe and/or ON
7
Q
Management
A
Orbital CT scan/MRI to rule out orbital cellulitis or tumor.
Oral steroids. Responds well!!!
8
Q
How fast is the onset
A
Very quick, painful onset. Present in 65% of cases
