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Jacquet's erosive dermatitis (JED) is a severe irritant dermatitis characterized by erosive genital and perianal lesions, often misdiagnosed due to overlapping clinical features. This case report presents two adult cases of JED with distinct clinical and dermoscopic findings. Dermoscopy revealed a characteristic polymorphic vascular pattern, including short linear, curved, coiled, dotted, and globular vessels, aiding in the diagnosis and differentiation from similar conditions. These findings highlight dermoscopy's utility as a non-invasive diagnostic tool for JED, potentially reducing the need for biopsy., Competing Interests: Human subjects: Consent for treatment and open access publication was obtained or waived by all participants in this study. Conflicts of interest: In compliance with the ICMJE uniform disclosure form, all authors declare the following: Payment/services info: All authors have declared that no financial support was received from any organization for the submitted work. Financial relationships: All authors have declared that they have no financial relationships at present or within the previous three years with any organizations that might have an interest in the submitted work. Other relationships: All authors have declared that there are no other relationships or activities that could appear to have influenced the submitted work., (Copyright © 2024, Trumboo et al.)