A lump in the male breast is not always cancer, but it is important to have any lump in the breast checked by a medical professional to determine the cause. In men, breast lumps are most often caused by a noncancerous (benign) condition called gynecomastia. This condition causes the breast tissue to enlarge and can create a lump that feels rubbery or firm. However, it is important to have a lump in the male breast evaluated by a healthcare professional to rule out breast cancer and it is important to catch it early. The healthcare professional will examine the lump, possibly order a mammogram or ultrasound, and based on the results, a biopsy may be performed to determine if the lump is benign or cancerous. If you feel a lump in your breast, it is important to consult a medical professional for an evaluation. Don't ignore it, early detection can make a huge difference in the outcome of the disease.