The Hospício de Juquery, near the city of São Paulo (Brazil) was founded in 1896 and after few years it was decided that the institution should have the best possible facilities to study neuropathology. In 1921, a young psychiatrist, Antonio Carlos Pacheco e Silva was sent to the Hôpital de la Salpêtrière (Paris) to study neuropathology. There, Pacheco e Silva (later Prof.Pacheco e Silva) befriended Konstantin N. Tretiakoff accepted an invitation to become the first Chairman of the newly created neuropathology department of the Hospício de Juquery. During his stay in this institution, from 1922 to 1924 or early 1925, he worked very hardly and produced many publications. Here we present and comment some of the papers he published in a Journal (Memórias do Hospício de Juquery - "Memoirs de l'Hôspice de Juquery"), which had been recently created and present some information of this poorly known period of his life.
Parkinson's disease; Tretiakoff; substantia nigra; Brazil
