Aetius of Amida was a physician to the Byzantine Emperor Justinian in the sixth-century AD. His Tetrabiblion is an accurate and important source for earlier medical authorities such as Rufus of Ephesus, Leonides and Oribasius in surgery, Soranus and - via Philumenus - Archigenes in gynecology and obstetrics. The Tetrabiblion also contains the best ancient accounts of diseases of the eye, ear, nose, throat and teeth, and Aetius describes procedures (tonsillotomy, urethrotomy, treatment of hemorrhoids) which are not found elsewhere. In previous Latin editions of this work, the first of which was printed in Basel in 1533, several of the sixteen books were translated by Montanus and several by Cornarius. For this edition the whole work was translated by Cornarius. Aldus printed the first eight books in the original Greek in 1534, but the rest of the work was not printed in the original language until the twentieth-century., Adams A-306; Brunet I, 104.