FIGURE 2. A 24-y-old woman with osteosarcoma in left humerus (patient 14). (A) Early ^99mTc-MIBI image shows intense tracer accumulation in tumor. (B) Late ^99mTc-MIBI study demonstrates significant clearance of ^99mTc-MIBI (WR%, 40%). (C) Immunohistochemical analysis of biopsy specimen is consistent with strong and diffuse MRP expression.