A 21-year-old woman with an unremarkable medical history was referred to our department with a 2-month history of alopecic lesions on her scalp. Physical examination revealed 2 skin-coloured, dome-shaped cystic tumours with a central keratin plug, associated with alopecia on the temporal and occipital scalp regions, respectively. A melanocytic naevus was seen near one of the patches (Fig. 1a, b). Dermoscopy
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