01123nas a2200157   4500000000100000008004100001100002800042700001400070700001400084700001800098700001300116245004800129300001200177490000700189520076900196       2019                            d1 aRodríguez del Valle KM1 aMuñoz SN1 aÁvila MM1 aHernández HB1 aRamos SL00aFenómeno de lucio: A propósito de un caso  a155-1610 v323 aAbstract: The Lucio phenomenon is an immunological reaction characterized by ulcerated plaques and necrotic ulcers in the extremities. It is more common in patients that have not received treatment before or in those that received it in an inadequate way and it is manifested clinically as purpuric patches that progress to superficial, polygonal or angled ulcerous lesions with burning sensation in a patient without fever, general symptoms or visceral damage. The clinical picture does not last more than 15 days. We present a male patient 67 years old with antecedents of Hansen (intra domiciliary contact) examined in a local hospital in Florida presenting dark patches (spots) on arms and legs and diagnosed of Lucio`s phenomenon type of lepromatous leprosy.