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A 47-year-old man presented with a history of pain in the left lower extremity and a five-year history of limitation of movement. After activity, the symptoms became worse and clinical images showed multiple lesions of the left tibia and fibula. For the last 5 years, the patient had experienced aggravation of symptoms and limitation of hip and knee joint motion (figure 1A). A removal of hyperplastic bone was performed from the left hip and knee joints. Review the high-quality, interactive digital Aperio slide at http://virtualacp.com/JCPCases/jclinpath-2019-206101/ and consider your diagnosis.
Handling editor Iskander Chaudhry.
Correction notice This article has been corrected since it was published Online First. The slide link has been updated.
Contributors YJ and XZ performed the experiments. YL and LH provided essential material. YL and HW designed the experiments. YL wrote the draft of the manuscript. YL and HW critically reviewed the manuscript. All authors approved the final version of the manuscript.
Competing interests None declared.
Patient consent for publication Obtained.
Provenance and peer review Commissioned; internally peer reviewed.
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