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Fig. 1 (A) Localized, grouped, pinhead-sized, black-colored, comedo-like lesions with erythematous scarring plaques on the right shoulder and back, mimicking a linear dermatomal lesion. (B) Dermoscopic findings showed multiple, round-to oval-shaped, comedo-like openings with a central, dark brown-color keratin plug and homogeneous, light brown, halo pigmentation. (C) Histologic findings revealed eosinophilic keratin and sebum material in a dilated follicular structure in the dermis (H&E, ×40). (D) The comedo-like lesions gradually disappeared after 4 months.
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