MR Imaging of Muscle Injury

Shelly, Martin J.; Hodnett, Philip A.; MacMahon, Peter; Moynagh, Michael R.; Kavanagh, Eoin C.; Eustace, Stephen

doi:10.1016/j.mric.2009.06.012

Cited by 55 publications

(52 citation statements)

References 98 publications

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“…11 Of the 43 cases, 2 were classified as grade 0, 14 as grade I, 18 as grade II, and 9 as grade III. When these were analyzed by games missed (Table 4), those with a grade 0 injury missed an average of 0 games; grade I, 1.1 games (range, 0-4); grade II, 1.7 games (range, 0-3); and grade III, 6.4 games (range, 3-16).…”

Section: Resultsmentioning

confidence: 99%

“…All MRIs were performed within 3 days of the acute injury. MRIs were evaluated by 2 musculoskeletal radiologists, were graded with the traditional grade 11 (Table 1), and scored according to number of muscles involved, location of injury, percentage cross-sectional involvement, muscle retraction, edema, long-axis T2 sagittal plane signal length, and chronic changes (Table 2). MRI grades and scores were then correlated with number of practices and games missed.…”

Section: Methodsmentioning

confidence: 99%

“…It also allows the radiologist to grade the injury on the basis of radiologic strain grade. 11 Although this additional information is helpful, there is no clinical classification system that allows for prediction of return to activity based on the extent of injury seen on MRI. Slavotinek et al 14 published a prospective study evaluating 37 Australian Rules football players after hamstring injuries, comparing the extent of injury on MRI with time lost from competition.…”

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confidence: 99%

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Hamstring Injuries in Professional Football Players

Cohen

Towers

Zoga

et al. 2011

Sports Health: A Multidisciplinary Approach

131

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Background:Magnetic resonance imaging (MRI) allows for detailed evaluation of hamstring injuries; however, there is no classification that allows prediction of return to play.Purpose:To correlate time for return to play in professional football players with MRI findings after acute hamstring strains and to create an MRI scoring scale predictive of return to sports.Study Design:Descriptive epidemiologic study.Methods:Thirty-eight professional football players (43 cases) sustained acute hamstring strains with MRI evaluation. Records were retrospectively reviewed, and MRIs were evaluated by 2 musculoskeletal radiologists, graded with a traditional radiologic grade, and scored with a new MRI score. Results were correlated with games missed.Results:Players missed 2.6 ± 3.1 games. Based on MRI, the hamstring injury involved the biceps femoris long head in 34 cases and the proximal and distal hamstrings in 25 and 22 cases, respectively. When < 50% of the muscle was involved, the average number of games missed was 1.8; if > 75%, then 3.2. Ten players had retraction, missing 5.5 games. By MRI, grade I injuries yielded an average of 1.1 missed games; grade II, 1.7; and grade III, 6.4. Players who missed 0 or 1 game had an MRI score of 8.2; 2 or 3 games, 11.1; and 4 or more games, 13.9.Conclusions:Rapid return to play (< 1 week) occurred with isolated long head of biceps femoris injures with < 50% of involvement and minimal perimuscular edema, correlating to grade I radiologic strain (MRI score < 10). Prolonged recovery (missing > 2 or 3 games) occurs with multiple muscle injury, injuries distal to musculotendinous junction, short head of biceps injury, > 75% involvement, retraction, circumferential edema, and grade III radiologic strain (MRI score > 15).Clinical Relevance:MRI grade and this new MRI score are useful in determining severity of injury and games missed—and, ideally, predicting time missed from sports.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Hamstring Injuries in Professional Football Players

Cohen

Towers

Zoga

et al. 2011

Sports Health: A Multidisciplinary Approach

131

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“…Grade 2 is a moderate injury with loss of muscle strength and range of motion. Grade 3 is a severe injury, typically related to a complete tear, with loss of function (20,21). Grading of muscle Bilateral traumatic tears of the hamstring tendons at their ischial origins in a 46-year-old former track athlete who slipped on wet grass.…”

Section: Indirect Injury Muscle Strainmentioning

confidence: 99%

MR Imaging of Muscle Trauma: Anatomy, Biomechanics, Pathophysiology, and Imaging Appearance

et al. 2018

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“…Muscle strain is the most common muscle injury sustained by both the general and sporting populations (Blankenbaker and Tuite 2010;Linklater et al 2010;Shelly et al 2009;Slavotinek 2010). Muscle strains occur when the muscle is subjected to an excessive tensile force, which leads to overstretching and rupture of myofbrils (Kijowski 2011).…”

Section: Acute Tensile Overloadmentioning

confidence: 99%