Reverse Koebner phenomenon induced by the Mantoux test in erythrodermic psoriasis: A case report and literature review

The Koebner phenomenon (KP) was first described in patients with psoriasis.1 It was subsequently reported to occur with many dermatologic disorders.2 However, reverse KP, defined as the disappearance of lesions of a particular dermatosis at the injury site, is a rare condition with only a few reported cases.3-6