Abstract
Purpose: :
To provide the first description of high definition OCT imaging of a subretinal nematode in DUSN, and to investigate the ability of HD-OCT to locate the nematode.
Methods: :
A 41 year old woman with a diagnosis of DUSN and subsequent laser photocoagulation of the nematode underwent serial HD-OCT Scans with Zeiss Cirrus HD-OCT at week 1, week 8 and week 16 after laser.
Results: :
The HD-OCT scans at week 1 showed the subretinal location of the worm that appears as a hypoechoic circle surrounded by an hyperechogenic area of inflammation. Images at weeks 8 and week 16 show the hypoechoic worm body disappear and the area of inflammation decreasing as a hyperechoic scar develops. Fundus examination and fundus photography at any of the followupvisits after the laser were unable to visualize the worm and only showed an area of retinal whitening.
Conclusions: :
We could visualize the subretinal nematode usingHD-OCT. We found it especially a useful modalityat 1 week after laser when fundus photography showed only inflammation. The HD-OCT can be a valuable diagnostic tool in the evaluation and management of DUSN caused by a subretinal nematode.
Keywords: retinitis • imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound)