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Infectious diseases are closely related to many cases of cancer—either directly by causing or propagating cancer or indirectly by providing the grounds for opportunistic infections or complicating treatment of cancer. Worldwide, a large fraction of all cancer cases—2 million (16.1%) of the total 12.7 million new cases annually—are attributable to infectious diseases. Less developed countries are affected more (22.9%) than more developed countries (7.4%) as hygiene as well as prevention or treatment of infectious disease are less developed in these regions. Incidence of infection-related cancer cases varies 10-fold by region from 3.3% in Australia and New Zealand to 32.7% in sub-Saharan Africa [1]. The most relevant infectious pathogens identified for the development of cancer are Epstein–Barr virus, Helicobacter pylori, hepatitis B and C virus, human herpesvirus 8, human papillomavirus and Opisthorchis viverrini. Nevertheless, the number of cancer cases related to yet unknown infectious causes or unrecognized causal links between infection and cancer is likely much higher. The current issue of the Magazine of European Medical Oncology (MEMO) highlights the diversity of infectious pathogens related to cancer cases. Five different reports describe infectious complications or opportunistic infections in patients with malignant diseases including viral and bacterial pathogens [2,3,4,5,6]. In an additional contribution, the clinical relevance of bacterial infections and their therapy with novel antimicrobial drugs is discussed. The field of cancer research focusing on infectious pathogens that modulate or cause cancer is highly active and the current submissions to the journal emphasize this highly dynamic and interesting trend.
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C. Steininger declares that he has no competing interests.
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Steininger, C. Clinically relevant infections in hematatology and oncology. memo 14, 220 (2021). https://doi.org/10.1007/s12254-021-00739-9
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DOI: https://doi.org/10.1007/s12254-021-00739-9