Professor Petros Kokkalis (Greek: Πέτρος Κόκκαλης, 18 September 1896 – 15 January 1962) was a distinguished professor of Medicine in the University of Athens has been one of the leading figures of Medicine in pre WWII Greece, introducing pioneering methods in thoracic surgery and neurosurgery. His main medical achievements include the introduction of  thoracoplasty in Greece and removal of the phrenic nerve for the treatment of tuberculosis, as well as the first pneumonectomy with the Tourniquet method and the first pericardiectomy for the release of compressive pericarditis.^[1][2]