Yes, breast cancer can occur in men, although not common. If there is a lump in a male breast, mammographic evaluation is appropriate.
Yes. Mammograms will show the breast tissue and any lupms in the breast. That is the case in both female as well as male breast cancer.
Likely. Physical examination & mammogram with possible breast ultrasound can be helpful in evaluating males for breast cancer. Needle biopsy of a firm breast mass may also be indicated.