TY - JOUR T1 - Melanoacanthoma: a potential pitfall of reflectance confocal microscopy JO - Anais Brasileiros de Dermatologia T2 - AU - Porto,Ana Carolina Souza AU - Blumetti,Tatiana Pinto AU - Macedo,Mariana Petaccia de AU - Braga,Juliana Casagrande Tavoloni SN - 03650596 M3 - 10.1016/j.abd.2019.01.002 DO - 10.1016/j.abd.2019.01.002 UR - http://www.anaisdedermatologia.org.br/en-melanoacanthoma-potential-pitfall-reflectance-confocal-articulo-S0365059619300753 AB - Melanoacanthoma is a rare variant of seborrheic keratosis, which is notable for dark pigmentation and fast radial growth, making it difficult to distinguish from melanoma. Histologically, it is characterized by proliferation of keratinocytes and dendritic melanocytes. The authors report a scalp lesion, fast growing, suspected by dermoscopy and confocal microscopy examination, with dendritic cells distributed throughout the lesion. Based on these findings, it was not possible to classify this lesion as clearly benign, so it was excised. Histopathologic evaluation and immunostain were consistent with melanoacanthoma. ER -