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A comedo (plural comedones) is a plugged follicular orifice.
Open comedones
Closed comedones
Skin lesions and conditions in which there are prominent comedones include:
Comedonal acne
Comedones in hidradenitis suppurativa
Solar comedones
Discoid lupus erythematosus
Dermatoscopy of seborrhoeic keratosis. Rectangles highlight comedones
Papillomatous naevus
Comedone naevus
Giant comedo
Multiheaded comedo cyst
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