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Background: Determining whether repigmentation within or adjacent to lentigo maligna or lentigo maligna melanoma (LM/LMM) scars represents recurrence of melanoma is challenging. The use of reflectance confocal microscopy (RCM) and dermoscopy may aid in differentiating true melanoma recurrence from other causes of repigmentation.Objectives: To describe the characteristics of repigmentation within or adjacent to LM/LMM scars observable on RCM and dermoscopy. Methods:We retrospectively analysed patients who presented with new pigmentation within or adjacent to scars from surgically treated LM/LMM between January 2014 and December 2018. Clinical and demographic characteristics and time to recurrence were recorded. RCM was used to evaluate areas of pigmentation before biopsy. If available, dermoscopic images were evaluated.Results: In total, 30 confocal studies in 29 patients were included in the study cohort. Twentyone patients had biopsy-confirmed recurrent LM/LMM; the remainder had pigmented actinic keratosis (n=4) or hyperpigmentation/solar lentigo (n=5). RCM had sensitivity of 95.24%

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