I found lumps in my breast a year ago. The Breast Cancer Surgeon's first question to me was "have you ever received an injury to the breast?" Apparently injury to the breast can create lumps that need investigation - biopsies, mammograms, MRI's etc are unpleasant & expensive. Turns out my lumps were probably caused by a breast knock when I was younger. Anything that will protect the breasts in contact sports should be obligatory.