are microcalcifications cancerous
Although breast calcifications are usually noncancerous (benign), certain patterns of calcifications â such as tight clusters with irregular shapes â may indicate breast cancer. On a mammogram, breast calcifications can appear as macrocalcifications or microcalcifications. 1  Macrocalcifications. 2  These show up as large white dots or dashes. 3  They're almost always noncancerous and require no further testing or follow-up.