BM biopsy stained with B9.8 shows strong expression of NY-ESO-1 protein in myeloma plasma cells. Images (left panel, original magnification × 10, numerical aperture 0.3; right panel, original magnification × 20, numerical aperture 0.46) were visualized with an Olympus microscope, type BH2-RFCA. Images were acquired with a SPOT camera (Diagnostics Instruments, Sterling Heights, MI) and SPOT Advanced version 3.5.6 software without image manipulation.