Orbital Pseudotumor

John P. Christodouleas and Roland Engel

 Background

What are 2 other terms for orbital pseudotumor (OP)?

Other terms for OP:

1. 
   

   Lymphoid hyperplasia

   
   
2. 
   

   Pseudolymphoma

What is the eponym given to OP with cavernous sinus involvement?

Tolosa-Hunt syndrome is OP with cavernous sinus involvement.

What % of pts with OP will subsequently develop a malignant lymphoma?

5%–25% will subsequently develop a malignant lymphoma. (Orcutt JC et al., Br J Ophthalmol 1983; Mittal BB et al., Radiology 1986)

Does OP affect children, adults, or both?

OP affects both children and adults. ~5%–15% are pediatric cases. (Smitt MC et al., Semin Radiat Oncol 1999)

Name 5 signs/Sx associated with OP.

Signs/Sx associated with OP:

1. 
   

   Orbital mass

   
   
2. 
   

   Orbital pain

   
   
3. 
   

   Proptosis

   
   
4. 
   

   Abnl extraocular movements (e.g., diplopia)

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