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Fig. 3B. —13-year-old girl who underwent chelation therapy for 7 years 7 months. Her height was at 10th percentile at time of MR imaging. Sagittal spin-echo T1-weighted image (450/15) shows hypointense lesions with subchondral extension (straight arrow) at distal femoral epiphysis. Bony epiphyseal outline appears irregular. Lamellar area of hypointensity (curved arrow) is present in patella.