Abstract
A 82-year-old man presented with left humerus pain. MRI revealed a lesion in the left humerus appearing hyperintense on T2WI and hyperintense on DWI. 18F-FDG PET/CT demonstrated high FDG uptake in the lesion. Surgical resection was performed under the preoperative diagnosis of chondrosarcoma. However, a histopathological analysis confirmed the diagnosis of phosphoglyceride crystal deposition disease (PGDD). PGDD is an extremely rare disease, and this is the first report of PGDD occurring in the humerus. Bone lesions showing high uptake of FDG are usually malignant lesions; however, it is important to consider the possibility of benign diseases such as PGDD.
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