Abstract
The author will report three cases of acute relapse which occured in the course of neural leprosy. The results of the histopathological observation were as following:
(1) The histopathological observation of erythema corresponded with that of tuberculo- ide leprosy.
(2) The observation of peripheral nerves showed the sings of so-called macula tubercu- loide as in tuberculoide leprosy.
(3) Its clinical symptoms were like those of the bulbar palsy.
(4) In the course of the acute relapse, "Mitsuda' s Reaction" reaction positive more strongly.
(5) As the cause of the acute relapse, it is thought that lepra bacilli which have been latent in the peripheral nerves are poured into the circulation of the blood on the same oppotunity and show these sings in the skin and nerves.
