ABSTRACT
Chloracne is a refractory acneiform eruption due to halogenated polyaromatic compound(eg. dioxin, dibenzofurans, polychlorinated biphenyls, etc.). 2, 3, 7, 8-tetrachlorodibenzo-p-dioxin, a kind of dioxin isomer, contained in the Agent Orange which was used for defoliating agent during Vietnam war. It is characterized by recalcitrant comedones and cyst predominantly in the malar and postauricular area. Lesions of the penis and scrotum are also relatively frequent. The key pathological feature is the non-inflammatory keratinization of pilosebaceous unit. The meibomian glands are typically affected. Xerosis, conjunctivitis, pigmentation, follicular hyperkeratosis, actinic elastosis are occasionally associated with chloracne. We report a case of typical chloracne due to exposure to defoliating agent during Vietnam war in a 54-year-old-man who shows typical clinical and histopathological features.