Dermatology: Practical and Conceptual Image Letter | Dermatol Pract Concept 2020;10(2):e2020047 1 Dermatology Practical & Conceptual Case Presentation A 55-year-old woman with a personal history of 2 previous melanomas was referred for assessment. Full-skin examina- tion revealed few nevi, mostly dome-shaped dermal subtype, cherry angiomas, and seborrheic keratosis. On her back, a clinically banal-looking lesion was found close to a mela- noma scar (Figure 1A). Dermoscopy initially revealed typical findings pointing to intradermal nevus with cobblestone pat- tern and area of fibroses attributed to trauma; when lateral pressure was exerted, the basis of the lesion was exposed, revealing pseudopods and globules irregularly distributed at the periphery of the lesion (Figure 1, B-D). The lesion was excised and histopathology reported in situ melanoma asso- ciated with dermal nevus. Teaching Point Training and utilization of dermoscopy is recommended for clinicians routinely examining skin lesions. Dermoscopy must be applied to all lesions and not just to those suspicious from a clinical point of view [1]. When facing raised or peduncu- lated lesions, the base of the lesion must be examined. In this case, dermoscopy additionally provided crucial information for early recognition of a melanoma that might have been overlooked if it had been assessed solely by the naked eye. Reference 1. Seidenari S, Longo C, Giusti F, Pellacani G. Clinical selection of melanocytic lesions for dermoscopy decreases the identification of suspicious lesions in comparison with dermoscopy without clinical preselection. Br J Dermatol. 2006;154(5):873-879. Hidden Melanoma Gabriel Salerni,1,2 Carlos Alonso2 1 Dermatology Department, Hospital Provincial del Centenario de Rosario, Universidad Nacional de Rosario, Argentina 2 Diagnóstico Médico Oroño, Rosario, Argentina Key words: melanoma, dermoscopy, melanoma incognito, diagnosis Citation: Salerni G, Alonso C. Hidden melanoma. Dermatol Pract Concept. 2020;10(2):e2020047. DOI: https://doi.org/10.5826/ dpc.1002a47 Accepted: February 13, 2020; Published: April 3, 2020 Copyright: ©2020 Salerni and Alonso. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Funding: None. Competing interests: The authors have no conflicts of interest to disclose. Authorship: Both authors have contributed significantly to this publication. Corresponding author: Gabriel Salerni, MD, PhD, Bv. Oroño 1441, CP 2000, Rosario, Argentina. Email: gabrielsalerni@hotmail.com https://doi.org/10.5826/dpc.1002a47 https://doi.org/10.5826/dpc.1002a47 mailto:gabrielsalerni@hotmail.com 2 Image Letter | Dermatol Pract Concept 2020;10(2):e2020047 Figure 1. (A) Banal-looking lesion, clinically consistent with dermal nevus, close to melanoma scar. (B-D) With lateral pressure, globules and pseudopods irregularly distributed at the periphery were observed in the base upon dermoscopy.