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© 2002 by the American Institute of Ultrasound in Medicine
J Ultrasound Med 21:1113-1119 • 0278-4297

Correlation Between Sonographic and Pathologic Findings in Muscle Injury

Experimental Study in the Rabbit

Hyoung Jung Kim, MD, Kyung Nam Ryu, MD, Dong Wook Sung, MD and Yong Koo Park, MD

Departments of Diagnostic Radiology (H.J.K., K.N.R., D.W.S.) and Pathology (Y.K.P.), Kyung Hee University Hospital, Seoul, South Korea.

Address correspondence and reprint requests to Kyung Nam Ryu, MD, Department of Diagnostic Radiology, Kyung Hee University Hospital, 1 Hoekidong, Dongdaemunku, Seoul 130-702, South Korea.

Objective. To evaluate the serial sonographic findings of experimental muscle injury and to correlate those findings with the pathologic findings at each period. Methods. A muscle injury was artificially inflicted in 18 legs of 9 rabbits. Sonographic follow-up images were obtained 1, 3, and 7 days and 2, 3, 4, 6, and 8 weeks after infliction of muscle injury. Pathologic specimens were obtained for comparison with sonographic findings on each date. Results. There was high echogenicity in the central portion after 3 days. It changed to low echogenicity after 7 days. There were linear echogenic lines in the central portion after 4 weeks, and these lines increased in number after 6 weeks. The peripheral portion exhibited high echogenicity up to 7 days. This high echogenicity was normalized after 2 weeks. Pathologic specimens showed hematomas, fibrin, and necrotic muscle fibers in the central portion up to 3 days after injury. Fibrin occupied most of the central portion after 2 weeks. Regenerating muscle fibers appeared within the fibrin clot after 4 weeks, and they became more prominent after 6 weeks. Necrotic muscle fibers, hemorrhage, and inflammatory cells of the peripheral portion disappeared after 2 weeks. Conclusions. Serial sonography of muscle injury was well correlated with the pathologic specimen up to 7 days after injury. After 4 weeks, regenerating muscle fibers showed a good correlation with the finding on sonography. Therefore, sonography can be helpful in diagnosis of muscle injury as well as in evaluation of the regenerating muscle fibers.

Key Words: muscles • muscles, injuries • muscles, sonography




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Copyright © 2002 by the American Institute of Ultrasound in Medicine.