Vikki, the shape of a suspicious mass can't really identify whether or not it's cancerous. Cancerous masses can be completely round and smooth, like a cyst; they can also have ragged edges such as you describe. Benign tumors and other benign breast conditions follow the same pattern: they can be smooth and round or elongated; or irregularly shaped. Thus your radiologist's suggestion you have a biopsy, because only a biopsy can rule out cancer for sure.

Should you be scared? No. Fear doesn't accomplish anything; it simply makes you feel bad. Action is the way to get past fear, so I suggest you schedule your biopsy and get it over with as quickly as possible, so you can move forward - whatever the diagnosis. Be advised that about 85% of breast biopsies are negative; no cancer. So the odds are definitely on your side. Best of luck - I hope your biopsy brings good news. PJH