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  • Title: Differentiating mild papilledema and buried optic nerve head drusen using spectral domain optical coherence tomography.
    Author: Kulkarni KM, Pasol J, Rosa PR, Lam BL.
    Journal: Ophthalmology; 2014 Apr; 121(4):959-63. PubMed ID: 24321144.
    Abstract:
    PURPOSE: To evaluate the clinical utility of spectral domain optical coherence tomography (SD-OCT) in differentiating mild papilledema from buried optic nerve head drusen (ONHD). DESIGN: Comparative case series. PARTICIPANTS: Sixteen eyes of 9 patients with ultrasound-proven buried ONHD, 12 eyes of 6 patients with less than or equal to Frisén grade 2 papilledema owing to idiopathic intracranial hypertension. Two normal fellow eyes of patients with buried ONHD were included. METHODS: A raster scan of the optic nerve and analysis of the retinal nerve fiber layer (RNFL) thickness was performed on each eye using SD-OCT. Eight eyes underwent enhanced depth imaging SD-OCT. Images were assessed qualitatively and quantitatively to identify differentiating features between buried ONHD and papilledema. Five clinicians trained with a tutorial and masked to the underlying diagnosis independently reviewed the SD-OCT images of each eye to determine the diagnosis. MAIN OUTCOME MEASURES: Differences in RNFL thickness in each quadrant between the 2 groups and diagnostic accuracy of 5 independent clinicians based on the SD-OCT images alone. RESULTS: We found no difference in RNFL thickness between buried ONHD and papilledema in any of the 4 quadrants. Diagnostic accuracy among the readers was low and ranged from 50% to 64%. The kappa coefficient of agreement among the readers was 0.35 (95% confidence interval, 0.19-0.54). CONCLUSIONS: We found that SD-OCT is not clinically reliable in differentiating buried ONHD and mild papilledema.
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