Studies show that microorganisms may contribute to some forms of cancer. For example, H. pylori infection are strongly linked to gastric adenocarcinoma. I found a list about some certain microbes and the site of cancer.
Site of cancer Microbe
stomach Helicobacter pylori
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liver HBV, HCV, Opisthorchis viverrini,
Clonorchis sinensis
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cervix, vagina, vulva, HPV
anus, penis, oropharynx
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adult T-cell lymphoma HTLV-1
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bladder Schistosoma haematobium
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kaposi sarcoma, KSHV or HHV8
primary effusion lymphoma
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nasopharynx, hodgkin lymphoma, EBV
non-hodgkin lymphoma
