थर्मल लेज़र फोटोकोएगुलेशन द्वारा पर्याप्त ट्यूमर नियंत्रण न प्राप्त होने के बाद एक्स्ट्रापैपिलरी रेटिनल हेमांजियोब्लास्टोमा (1.5–4.5 मिमी) का उपचार

References

DOI: 10.1097/IAE.0000000000002572

• Extrapapillary RH between 1.5 and 4.5 mm in diameter are more difficult to destroy using thermal laser photocoagulation.
• Trans-scleral cryotherapy is often effective for RH in this size range, either as treatment applied to lesions refractory to previous laser photocoagulation, or as first-line therapy.
• Treatment can be applied trans-conjunctivally for anterior tumors, or trans-sclerally after conjunctival incision to enable appropriate probe placement for more posterior lesions.
• The technique varies, with some using a single freeze-thaw cycle (typically in the context of treating tumors already partly-regressed from prior laser photocoagulation, and others using a double freeze-thaw method.
• Five months after cryotherapy, the tumor is significantly smaller and its temporal aspect appears fibrotic.
• Feeding/draining vessels are much less dilated and tortuous.
• Macular edema and lipid have improved.