Doctor of Medicine, Semmelweis University, Budapest, 1971. Doctor of Philosophy, Semmelweis University, 1997.
Resident, staff member, lecturer 1st Surgical Department Semmelweis University, 1971—1994, associate professor, since 1994. Senior consultant in endocrine surgery Semmelweis University, since 1991.
President Medical Association of Budapest Józsefváros, 1995—2002, 2006—2007. Member of Hungarian Diabetes Association, European Federation Endocrine Societies, International Society Endocrinology, European Association Endoscopic Surgery, International Society Surgery, International Association Endocrine Surgeons, Hungarian Medical Chamber (secretary 2002-2003, Hippokrates Medallion 2001), Hungarian Society Endocrinology and Metabolism (treasurer since 2003), Hungarian Society Gastroenterology, Hungarian Surgical Society (president monitoring committee since 1999).
Son of János Horányi (Hofhauser) and Éva Havel. Married Mária Sándor, April 20, 1974. Children: Melinda, Eszter.