Photoletter to the editor: Exogenous pigmentation after Diplopoda exposure leading to a dermatoscopic parallel ridge pattern on the plantar region

[摘要] The millipedes (also known as "gongolos") are arthropods characterized by a cylindrical body consisting of rings. When threatened, they release chemicals that can cause erythema and hyperpigmentation. We report the case of a patient who developed a darkened macule on the plantar region after stepping on a millipede. Dermatoscopic examination showed a parallel-ridge pattern, which is considered typical for acral melanoma. A detailed history was essential for the diagnosis, as the clinical and dermatoscopic features suggested a malignant melanocytic lesion.

[学科分类] 皮肤病学

[关键词] arthropods;dermoscopy;dermatoscopy;melanoma;parallel ridge;simulation