Follow-up/Toxicity

Question 1

What are the potential late toxicities of orbital RT?

Answer 1

Cataracts, permanent eye dryness, retinopathy, and optic neuropathy

Question 2

What is the RT dose limit of the lens?

Answer 2

Try to limit the lens to <8–10 Gy depending on the clinical situation.

Question 3

Diabetic pts are at an increased risk for what complication after orbital RT?

Answer 3

After orbital RT, diabetic pts are at an increased risk for RT retinopathy. (Wakelkamp IM et al., Ophthalmology 2004)