The purpose of this article is the description of a manuscript in the National Library of Israel. It contains a medical treatise written in Judeo-Spanish by a Sephardic Jew. According to the catalogue of the Institute of Microfilmed Hebrew Manuscripts (IMHM), the manuscript is a translation of the Canon of Avicenna but in reality it is a complex text, parts of which follow the Avicenna’s Canon and other sections that seem to be an original work based on the author’s own experience as a physician. The IHMH catalogue states that the work was written in Istanbul in the 17th century.El propósito de este artículo es la descripción de un manuscrito de la Biblioteca Nacional de Israel, el Fr 3172. Contiene un tratado médico escrito en judeo-españo...