Multiple sclerosis (MS) and Alzheimer's disease (AD) cause retinal thinning that is detectable in vivo using optical coherence tomography (OCT). To date, no papers have compared the two diseases in terms of the structural differences they produce in the retina. The purpose of this study is to analyse and compare the neuroretinal structure in MS patients, AD patients and healthy subjects using OCT. Spectral domain OCT was performed on 21 AD patients, 33 MS patients and 19 control subjects using the Posterior Pole protocol. The area under the receiver operating characteristic (AUROC) curve was used to analyse the differences between the cohorts in nine regions of the retinal nerve fibre layer (RNFL), ganglion cell layer (GCL), inner plexiform layer (IPL) and outer nuclear layer (ONL). The main differences between MS and AD are found in the ONL, in practically all the regions analysed (AUROC = 0.80, AUROC = 0.85, AUROC = 0.80, AUROC_ = 0.77, AUROC = 0.85, AUROC = 0.75, AUROC = 0.83), and in the paramacular zone (AUROC = 0.75) and infero-temporal quadrant (AUROC = 0.80) of the GCL. In conclusion, our findings suggest that OCT data analysis could facilitate the differential diagnosis of MS and AD.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10740772PMC
http://dx.doi.org/10.3390/biomedicines11123126DOI Listing

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