Siegfried Oberndorfer (24 June 1876 in Munich – 1944 in Istanbul) was a Jewish-German physician, pathologist, and cancer researcher.

[3] By detailed autopsies of soldiers killed in combat, Oberndorfer investigated possible therapies to heal serious war injuries.

His examining instruments are lodged in a display case in the foyer of the Schwabing Clinic — along with scientific notes about his experiences as a field doctor and handwritten letters from the front to his family in Munich.

[4] On April 1, 1933, the newly installed Nazi regime dismissed Oberndorfer from the Schwabing Clinic — along with chief physicians Otto Neubauer and David Mandelbaum — due to his Jewish ancestry.

He continued living and publishing in Turkey for the rest of his life, working as a full professor at the medical school and director of the Institute for General and Experimental Pathology in Istanbul.