Doctor of Medicine, Karolinska Institute, Stockholm, 1974. Doctor of Science, Karolinska Institute, Stockholm, 1974.
Docent in tumor biology Karolinska Institute, Stockholm, 1975, surgeon, 1975-1980, Sabbatsberg City Hospital, 1980-1989. Docent in surgery Karolinska Institute, Stockholm, 1987. Academy teacher surgery Karolinska University Hospital, 1989-1996, senior surgeon, 1996—2000, oncologist, since 2000.
Visiting professor liver and stomach cancer surgery National Cancer Center Hospital and National Matsudo Hospital, Tokyo, 1985-1991. Chairman Stockholm Regional Group Gastric Cancer, 1995—2007, National Group Cancer Unknown Primary, since 2007.
Lieutenant Medical Corps, 1991. Member Swedish Cancer Society (secretary science board 1974-1987), Academy Lancisiana (Rome, honorary).
Married Siri Leithoff, May 25, 1973. Children: Louise, Asa, Jakob.