Childhood diseases, infectious diseases, and fever as potential risk factors for cancer?

Childhood Diseases, Infectious Diseases, and Fever as Potential Risk Factors for Cancer? Objective: We investigated the assertion that past childhood diseases, acute and febrile infections as well as allergies have a preventive effect on cancer. Former studies on this topic show controversial results and methodical deficits. Patients and Method: The investigation was conducted as a retrospective case control study with 111 cancer patients and a group of 109 control persons from 3 hospitals in Berlin. Results: A significant change in the risk of developing cancer could only be observed for mumps (OR = 2.6; increased risk), whooping cough (OR = 2.7; increased risk), and colds in the recent past (OR = 0.7; decreased risk). Fever within the last 5 years showed no association with the development of malign tumors. Conclusion: We could not confirm the results of former studies which assumed a preventive effect of childhood diseases and fever on the cancer risk. On the contrary, on the basis of this investigation one might postulate a 2- to 3fold rise of the cancer risk by mumps or whooping cough. Because of divergent study results, deficits in the study designs, and a low evidence of the present findings no final statement on the association between childhood diseases or fever and cancer should be made.