Workup/Staging

Question 1

What is the DDx for an orbital mass?

Answer 1

RMS, malignant orbital lymphoma, thyroid ophthalmopathy, and nodular fasciitis. OP is a Dx of exclusion.

Question 2

What is the workup for an orbital mass?

Answer 2

The workup is the same as for a suspected orbital lymphoma, including CT/MRI brain/orbit and biopsy if necessary.

Question 3

How is OP subclassified?

Answer 3

There is no formal staging system for OP. OP is subclassified by the orbital anatomy involved with the inflammation.