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BackgroundPrimary localized cutaneous amyloidosis (PLCA) causes extracellular proteinaceous deposits in skin. It is clinically divided into macular amyloidosis, lichen amyloidosis and nodular amyloidosis. Atypical presentations of PLCA make the diagnosis challenging, requiring biopsy to confirm amyloid deposition in the upper papillary dermis.ObjectivesThis study used FotoFinder dermoscopy to characterize lichen and macular amyloidosis and correlated the dermoscopic features with histopathological findings.MethodsThis cross-sectional study enrolled patients with a clinical and histopathological diagnosis of PLCA. Dermoscopic examination was performed using the FotoFinder dermoscope, which provides a range of magnification from 20× to 140×.ResultsA total of 30 patients were included in the study. Common dermoscopic patterns of MA were white or brown central hubs, and common patterns of LA were white structureless, scar-like areas and central hubs. New dermoscopic findings were a day lily appearance in MA and white rosettes in LA.ConclusionsDermoscopy plays a pivotal role in demonstrating characteristic findings of PLCA. These findings were well corelated with histopathology, thus avoiding unnecessary biopsy for arriving at an accurate diagnosis of PLCA.

FotoFinder Dermoscopy Analysis and Histopathological Correlation in Primary Localized Cutaneous Amyloidosis