TY - JOUR AU - Rodríguez del Valle KM AU - Muñoz SN AU - Ávila MM AU - Hernández HB AU - Ramos SL AB - Abstract: 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. BT - Revista de leprología IS - 3 LA - spa N2 - Abstract: 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. PY - 2019 SP - 155 EP - 161 T2 - Revista de leprología TI - Fenómeno de lucio: A propósito de un caso VL - 32 ER -