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High definition optical coherence tomography (HD-OCT) is a non-invasive imaging technique, with significant relevance in different area, mainly ophthalmology. In recent years OCT has become a promising tool also for the in vivo evaluation and diagnosis of different skin diseases, especially skin cancers. HD OCT can be used as a reliable diagnosis method that provides useful information on the architecture of cutaneous layers and sometimes on cellular morphology in the epidermis and other structures of the skin. Our work brings new information about the value of HD-OCT in describing in vivo pattern of basal cell carcinoma, one of the most frequent non-melanocytic skin cancers, compared with histopathology and dermoscopy. [ABSTRACT FROM AUTHOR]