 [ Symptoms ] hi i am a 28 year old female i have had a pea sized lump near anus have had as long as can remember painless unchanged skin colored soft but not completely seems attached to skin but not really under it have had looked at and drs said was nothing concerning and one could not understand why i would want removed i have hemmeroids but this does not seem the same want to know what it could be first noticed it when i was about 10 [ Disease ] hi for your question i have searched the internet and it said  16 of cancers are caused by viruses or bacteria strictly speaking cancer is not contagious but a fair number of cancers are clearly caused by viral or bacterial infections lymphomas can be triggered by the epstein barr virus which also causes mononucleosis 