A triple-phase bone scan of the knee was performed with delayed SPECT/CT of the knees. Delayed whole body static imaging was also acquired. Dynamic flow and blood pool images show moderate hyperemia in bilateral medial tibial condyles in a bilaterally symmetrical pattern. Delayed static images with SPECT/CT of the knees show symmetrical intense focal uptake in bilateral medial tibial condyle metaphyses, with only subtle sclerotic changes seen on low dose CT. No definite fracture line is identified on low dose CT. The rest of both knee joints show normal activity. Delayed whole body static images show a normal tracer biodistribution in the rest of the skeleton. No other osteoblastic lesion is seen elsewhere.