[Histopathology of leprosy. Study of more than 2300 biopsies]

2,326 biopsies on Moroccan subjects suffering of leprosy had been studied in 4 years. After a critical study of histopathologic diagnosis and the classifications, the authors studied especially the lepromatous granuloma, its evolution during treatment and the lepromatous reactions. Defining histologically a reactional background, they make a certain generalisation among all the types of reactions observed in lepromatous patients.