Lucio's phenomenon (LP) is a special reactional state associated with diffuse 
multibacillary leprosy; both exhibit a limitative global distribution mainly in 
Mexico and Central America. We report a case of a 28-year-old female leprosy 
patient in the People's Republic of China, together with LP and positive 
anticardiolipin antibody, characterized by vascular thrombosis and invasion of 
blood vessel walls by leprosy bacilli, causing extensive skin ulcers and 
followed by a large number of atrophic scars.