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  • Title: Fibrous scar in the infrapatellar fat pad after arthroscopy: MR imaging.
    Author: Tang G, Niitsu M, Ikeda K, Endo H, Itai Y.
    Journal: Radiat Med; 2000; 18(1):1-5. PubMed ID: 10852649.
    Abstract:
    PURPOSE: We describe the MR appearance of fibrous scars in the infrapatellar fat pad after arthroscopy. MATERIALS AND METHODS: The subjects were 96 patients who underwent arthroscope-assisted anterior cruciate ligament (ACL) reconstruction and were examined by oblique sagittal MR imaging at different follow-up intervals. Two observers evaluated the characteristics of the fibrous scars in the infrapatellar fat pad. RESULTS: All fibrous scars with low signal intensity were accentuated at the portal and coursed horizontally through the infrapatellar fat pad. The fibrous scar within the fat pad occurred and peaked within 6 months after arthroscopy. It then subsided gradually and had disappeared by one year later in nearly half of the patients. CONCLUSION: Identifying MR imaging characteristics of fibrous scars in the fat pad after arthroscopy may be clinically helpful to differentiate these scars from other abnormalities that involve the infrapatellar fat pad.
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