Abstract
Purpose:
To compare the use of EDI-OCT and ultrasonography for early detection of marginal recurrence in posterior uveal melanoma treated with brachitherapy.
Methods:
recently available EDI-OCT has allowed to detect early recurrences of uveal melanoma after brachytherapy in 3 eyes of 3 patients (1 male and 2 female). Inclusion criteria were: posterior pole localization and rapidly regression to a flat scar. Every 4 months, all patients underwent complete follow-up visit including fundus examination, fundus photography (Panoret) , ultrasonography and EDI using SD OCT with the Heidelberg Spectralis (Heidelberg Engineering , Heidelberg. Germany).
Results:
in these patients, EDI-OCT was able to confirm recurrences already detected by ultrasonography, however the improved resolution of EDI-OCT allowed a more precise measurements of these lesions. In addition, EDI-OCT pointed out other small marginal nodules deemed undetectable by ultrasonography.
Conclusions:
EDI-OCT is particularly useful in identifying small posterior tumors as its axial resolution is approximately 3 to 4 µm compared with 10 µm for time-domain OCT and approximately 50 to 200 µm for ultrasonography, as reported in literature. Furthermore, in our study EDI-OCT documented its ability to located small recurrences before ultrasonography detection. In selected cases EDI-OCT proved to be a valid non invasive tool for monitoring uveal melanoma treated with brachytherapy.
Keywords: 624 oncology •
589 melanoma •
671 radiation therapy