Orbital Pseudotumor (IOIS)

Question 1

Around what age is orbital pseudotumor most commonly seen?

Answer 1

Young to middle age (20-50)

Question 2

Orbital pseudotumor is an inflammation of what?

Answer 2

EOMs and tendons, but can impact any soft tissue component of the orbit

Question 3

What are the common symptoms of orbital pseudotumor?

Answer 3

Unilateral pain (never bilateral unless in kids)
Red eye
Diplopia
Decreased VA

Question 4

About half of children with orbital pseudotumor may also have what additional symptoms?

Answer 4

Fever
Nausea
Vomiting

Question 5

What are the typical signs of orbital pseudotumor?

Answer 5

Proptosis
EOM restriction
Periorbital swelling
Chemosis without itching
Lacrimal gland enlargement
Ptosis
Hyperopic shift
ONH swelling
Increased IOP on inolved side
Reduced corneal sensitivity

Question 6

Why is the inflammation in orbital pseudotumor different than that of TED?

Answer 6

TED only affect the muscles, not the tendons