Niccolò Massa (1485–1569) was an Italian anatomist who wrote an early anatomy text Anatomiae Libri Introductorius in 1536.
Introduction to Northwestern University translation of book one of Andreas Vesalius' De Humani Corporis Fabrica, 2003. Introduction by Vivian Nutton. Free full text of first book
In 1536 Niccolo Massa describes the cerebrospinal fluid.