HI,Welcome with your query to HCM.
Based on the facts of your query,going by the painless 20 yrs old movable lump in testes,I don't have any reason for you to think it as cancer.Don't worry for the cancer of the testes being the cause of the ?enlarged breast/chest,for which You should check with your doctor.
It could be only obesity effect and nothing else,for your age,In my opinion.
I would suggest
Second Opinion from Surgeon,who would after proper diagnosis could treat according to its cause.
Hope you got the answer for your query.
Hope this would help you.
Welcome for any further query in this regard
Will appreciate writing your feedback review comments,to help the needy patients like you at HCM.
Good Day!!
Dr.Savaskar,
Senior Surgical Specialist
M.S.Genl-CVTS