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  • Title: Snapping knee caused by intra-articular tumors.
    Author: Mine T, Ihara K, Taguchi T, Tanaka H, Suzuki H, Hashimoto T, Kawai S.
    Journal: Arthroscopy; 2003 Mar; 19(3):E21. PubMed ID: 12627138.
    Abstract:
    Locking of the knee can present with no history of antecedent injury. We identified impingement of intra-articular tumors in 2 cases. Intra-articular tumors are relatively rare. Mechanical symptoms were present in both cases. On physical examination, there was a palpable mass at the medial region of the patellofemoral joint. The interior had been replaced mainly by amorphous necrotic tissue. The definite diagnosis of a soft-tissue mass of the knee could not be made on histologic examination.
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