The picture is a example showing the 3 breast TMA case sets. The image shows that for each case set, there are 4 replicate TMA blocks, A, B, C, & D. Two of the blocks under each case set are circled, with arrows pointing to 2 sections, indicating that applicants must accept a minimum of two sections (from different replicate blocks) from each of the three different case sets, for a minimum total of 6 sections.