​​Ronnie Pace had no idea men could even get breast cancer until he was diagnosed with the disease in April 2013. The reality that he might find a lump, he admitted, wasn't on his radar when he made an appointment to see his doctor about a chronic dry cough.

Pace, 73, a mediator and arbitrator living in Kerrville, Texas, underwent tests, including a chest CT scan, and was diagnosed with acid reflux. Pace's doctor prescribed a course of medication and asked him to return two weeks later. Since the cough disappeared during that span, Pace was shocked when at his next appointment, his doctor informed him the CT scan had discovered a small tumor in his right breast that could be malignant.

What are the signs?