Breast cancer is the most prevalent cancer in local women.A woman may feel as a lump in her breast, but modern technology is at the stage where it can be detected much earlier than that.Specialist breast radiologist David Green of the Bermuda Cancer & Health Centre said he aims to spot cancer cells when they are just a millimetre or two in size.“At that size a woman would not be able to feel a lump,” he said.And just what is he looking for? How does it look? Body & Soul sat with Dr Green to find out.Firstly there are two types of tissue in the breast.The first is glandular, which forms the structures for milk production and breast-feeding; the second is fatty.In mammography the glandular tissue appears white and the fatty tissue appears grey.Tissue abnormalities in the breast also appear white in mammograms. This makes finding abnormalities in breasts with a lot of glandular tissue more difficult than finding it in a breast with predominantly fatty tissue.Calcification: This is common. The tissue can be benign (non-cancerous). Sometimes it represents the beginnings of abnormal tissue which may turn into cancer. See the little dots just in front of the arrow in the picture.A mass: This is typically how breast cancer looks. The radiologist compares scans looking for any new mass. The mass usually has a slightly fuzzy edge.Asymmetric density: Radiologists try to match the left breast appearance with the right. They look for differences between the two. Mammogram images are taken of at least two angles of each breast. All angles are examined for asymmetric density.Architectural distortion: Cancer may pull tissue into itself from a central spot.It’s common for women to develop cysts in their breasts. Cysts are fluid-filled and pose no medical danger. But there’s no way to tell simply by feeling if a lump is a cyst or a solid and if it’s solid, whether or not it is cancerous.Dr Green said suspicious lumps seen under ultrasound will show clearly whether they are cystic or solid. A cyst will show as a black hole.