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Answer: D. Femoral epiphysis
Additional Imaging
Below are coronal proton density and axial and sagittal T2 fat suppressed MR images of the knee.



What is the most likely diagnosis?
A. Chondroblastoma
B. Giant Cell Tumor of Bone
C. Clear Cell Chondrosarcoma
D. Primary Lymphoma of bone
E. Nonossifying Fibroma