Contribution to the coincidence of malignant tumours and some allergic manifestations.

Clinical observations during the past decades led us to the early empirical assumptions that adult patients affected by certain types of allergic manifestations may have a lower prevalence of malignant tumors. In order to test those observations as well as some contradictory reports (1-3), we conducted a retrospective study using 32 years of records and statistics of a medium-sized hospital (420 beds) at St. Mary's Hospital, a general, non-chronic, teaching hospital, affiliated with McGill University in Montreal. The study has been realized during two periods: (a) 1965-1989 and (b) 1990-1996.