RESUMO
Abstract Polypoid melanoma is a variant of nodular melanoma, whose poor prognosis depends on its thickness and the presence of ulceration at the time of diagnosis. The authors report two cases of polypoid melanoma, presenting as broad, cauliflower-like, polypoid masses. Dermoscopy was characterized by a multicolored pattern, atypical polymorphic vessels, and the fiber sign. Clinical and dermoscopic features can help to diagnose polypoid melanoma and exclude other possible differential diagnoses. However, histology remains mandatory to confirm the diagnostic suspicion.
Assuntos
Humanos , Neoplasias Cutâneas/diagnóstico por imagem , Melanoma/diagnóstico por imagem , Pele , Dermoscopia , Diagnóstico DiferencialRESUMO
Relatado caso de paciente de 62 anos de idade que desenvolveu massa nodular erosiva no aparelho ungueal após trauma em caçada, diagnosticada como melanoma amelanótico doaparelho ungueal. Esta lesão é frequentemente diagnosticada erroneamente, permanecendo sem tratamento adequado por longos períodos. As taxas de erro diagnóstico são descritas como sendo de até 85% nos casos em que o médico não possui especialização em dermatologia.
This article describes the case of a 62-year-old patient who developed an erosive nodular mass on the nail apparatus after receiving a trauma during a hunting incident. The lesion was initially diagnosed as an amelanotic melanoma of the nail apparatus, illustrating the fact that this type of lesionis often misdiagnosed ? up to 85% of the time if the physician lacks dermatological expertise ?and remains untreated for prolonged periods.