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  • Title: Two unusual causes of peripatellar nonmetastatic positive bone scans in patients with malignancies: case reports.
    Author: Turner JW, Syed IB, Spencer RP.
    Journal: J Nucl Med; 1976 Aug; 17(8):693-5. PubMed ID: 932812.
    Abstract:
    Bone scans performed with 99mTc-polyphosphate in two patients with epidermoid carcinoma of the lung each showed activity in one knee area. In the first case, radiographs of the area revealed Pellegrini-Stieda calcification over the internal femoral condyle. Uptake corresponded to this process, rather than to a lesion deep in the bone. In the second case, the activity accumulation in the right tibia was the only abnormality noted in the scan. An open biopsy revealed Paget's disease, and no radiographic evidence of Paget's disease was found in any other bone. These cases again illustrate that localized accumulation of a bone-scanning agent, in patients with known primary tumors, does not necessarily denote malignancy in bone.
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