Husband's lump

My husband found a small lump in his chest 3 weeks ago.  It is about an inch to the side and down from his left nipple.  It is hard and about the size of a kidney bean.  We went to the doctor and he blew it off as a possible result of a medication my husband has recently started taking-singular-even though no mention of this particular side effect could be found in any reference guide of elsewhere. I don't want to make a mountain out of a kidney bean but I do want my husband to be safe.  I already have an appointment with another doctor.  Should we be worried?  Or is this something that is normal?

[CCF-RN,MSN-JS]

Dear Minna29, Male breast cancer is rare, but one out of every 150 cases of breast cancer involves a man, usually in men over 60 years old.  Although a painless breast lump is the most common sign, most breast lumps in men are benign (non-cancerous) and are related to some other cause.  If you and your husband are concerned, having a second opinion is always your option.