Myositis ossificans traumatica (circumscripta) and return to sport: A retrospective series of 19 cases.

OBJECTIVE: Myositis ossificans is a worrisome complication of muscle lesions in sports medicine. Our goal is to specify clinical, paraclinical and therapeutic elements to guide a myositis ossificans traumatica patient back into sport. METHOD: All patients having consulted between January 2006 and December 2012 presenting myositis ossificans with a recent muscle injury from playing sports were included. We excluded patients with myositis ossificans without an identified trauma, or from an old injury (>6 months). Ultrasound images were captured on a Philips(®) Sparq ultrasound machine with a linear probe (4-12MHz). The diagnosis of myositis ossificans was performed on 2 ultrasound criteria in context of recent muscle trauma: presence of ossification or calcification within a muscle on axial and longitudinal sections using B-mode and hyperactivity in power Doppler mode around the ossification/calcification. Clinical signs and treatment were collected systematically at inclusion, 6 months and 1 year. RESULTS: Among the 22 myositis ossificans cases diagnosed between January 2006 and December 2012, 19 were of traumatic origin, on a recent muscle lesion and were included in the study. Our patients resumed light physical activities 3 months after diagnosis for 89.5% of them (100% at 10 months) and returned to their earlier level 6 months after myositis ossificans diagnosis for also 89.5% of them (all patients having resumed sport at their earlier levels 12 months after diagnosis). CONCLUSION: Therapeutic abstention and persistence of ossification do not seem to be detrimental factors for resuming a sport at the earlier level with ultrasound monitoring.

Platelet-rich plasma (PRP) treatment of sports-related severe acute hamstring injuries.

PURPOSE: hamstring injury is the most common musculoskeletal disorder and one of the main causes of missed sporting events. Shortening the time to return to play (TTRTP) is a priority for athletes and sports medicine practitioners. HYPOTHESIS: platelet-rich plasma (PRP) injection at the site of severe acute hamstring injury increases the healing rate and shortens the TTRTP. STUDY DESIGN: Cohort study. METHODS: all patients with ultrasonography and MRI evidence of severe acute hamstring injury between January 2012 and March 2014 were offered PRP treatment. Those who accepted received a single intramuscular PRP injection within 8 days post-injury; the other patients served as controls. The same standardized rehabilitation program was used in both groups. A physical examination and ultrasonography were performed 10 and 30 days post-injury, then a phone interview 120 days post-injury, to determine the TTRTP at the pre-injury level. RESULTS: of 34 patients, 15 received PRP and 19 did not. Mean TTRTP at the pre-injury level was 50.9±10.7 days in the PRP group and 52.8±15.7 days in the control group. The difference was not statistically significant. CONCLUSION: a single intramuscular PRP injection did not shorten the TTRTP in sports people with severe acute hamstring injuries.

Clinical predictors of time to return to competition following hamstring injuries.

OBJECTIVES: hamstring strain injuries are the most common sports-related muscle injuries and one of the main causes of missed sporting events. HYPOTHESIS: clinical findings reflecting hamstring injury severity at presentation predict time to sports resumption. DESIGN: cohort study (prognosis); Level of evidence, 2. METHODS: five sports medicine specialists at four sports medicine centers prospectively evaluated 120 athletes within 5 days of acute hamstring injury. Patients were interviewed and asked to evaluate their worst pain on a visual analog scale (VAS). Four physical criteria were assessed at baseline: bruising, tenderness to palpation, pain upon isometric contraction, and pain upon passive straightening. The same standardized rehabilitation protocol was used in all patients. A standardized telephone interview was conducted 45 days after the injury to determine the time to-full recovery (≤40 days or >40 days). RESULTS: by univariate analysis, clinical criteria associated with a full recovery time >40 days were VAS pain score greater than 6, popping sound injury, pain during everyday activities for more than 3 days, bruising, and greater than 15° motion-range limitation. By multivariate analysis, only VAS pain score and pain during everyday activities were significantly associated with time to recovery >40 days (53% sensitivity, 95% specificity). CONCLUSION: the initial examination provides valuable information that can be used to predict the time to full recovery after acute hamstring injuries in athletes.

Value of sonography combined with clinical assessment to evaluate muscle injury severity in athletes.

CONTEXT: Predicting when an athlete can return to sport after muscle injury is a major concern. OBJECTIVE: To determine whether combining objective clinical and ultrasound findings at presentation accurately predicted time to sport resumption in athletes with muscle injuries. DESIGN: Cohort study. SETTING: Sports medicine clinic. PATIENTS OR OTHER PARTICIPANTS: A total of 93 consecutive patients, 87 male and 6 female, were seen over a 1-year period for sudden-onset muscle pain while engaging in a sporting activity within the last 5 days and inability to continue the training session or game. INTERVENTION(S): Standardized physical examination and sonogram. MAIN OUTCOME MEASURE(S): Statistical associations between clinical and sonographic features at presentation and time to sport resumption (<40 days or ≥ 40 days) were evaluated using multivariate models. Correlations between time to sport resumption predicted by a sports medicine specialist and actual time to sport resumption were evaluated using the Spearman rank correlation coefficient. RESULTS: The 93 patients had 95 injuries, caused by muscle contraction in 86 cases and impact in 9 cases. Only 7 injuries had normal sonogram findings. Late sport resumption was associated with 4 clinical criteria (bruising, tenderness to palpation, range-of-motion limitation compared with the other limb, and increased pain with isometric contraction during passive limb straightening) and 4 sonographic criteria (disorganized fibrous tissue, intramuscular hematoma, intermuscular hematoma, and power Doppler signal). The Spearman rank correlation coefficient between predicted and actual times was 0.669 (P < .0001) for mild exercise resumption and 0.804 (P < .0001) for full sport resumption. CONCLUSION: A combination of physical and sonographic data collected during the acute phase of sport-related muscle injury was effective in predicting time to sport resumption.

Value of ultrasonography for detecting ligament damage in athletes with chronic ankle instability compared to computed arthrotomography.

Ankle sprains may be followed by chronic pain and/or instability, which may induce substantial disability, most notably in athletes. Chronic ankle instability promotes the development of cartilage lesions in athletes. Therefore, accurate evaluation of the ankle ligaments is crucial to the optimal management of chronic ankle instability after a sprain. The objective of this study was to assess the performance of ultrasonography in assessing damage to the anterior talofibular ligament (ATFL) in athletes with chronic ankle instability after a sprain. Consecutive patients seen at the author's clinic for ankle instability more than 3 months after a sprain underwent ultrasonography and computed arthrotomography after a clinical anterior drawer stress test. Cohen's kappa was computed to evaluate agreement between the 2 imaging modalities. This study included 56 patients, 46 men and 10 women, aged 15 to 69 years (mean, 30.1 ± 10.6 years). Mean time from the sprain to imaging was 7.6 ± 4.02 months. ATFL damage was found by ultrasonography in 34 (61%) of 56 patients and by computed arthrotomography in 39 of 55 patients (71%; κ = 0.76). Cartilage damage was visualized by computed arthrotomography in 14 (25%) patients, all of whom had ATFL damage. Agreement was substantial (κ = 0.76) between ultrasonography and computed arthrotomography for assessing the ATFL. The data support the use of ultra-sonography as the second-line investigation after a standard radiographic assessment in athletes with chronic ankle instability after a sprain.

Diagnosis of anterior cruciate ligament rupture in an emergency department.

BACKGROUND: Although an early diagnosis is crucial to optimize outcomes after injury to the anterior cruciate ligament (ACL), little is known about the performance of emergency room physicians in diagnosing this injury. HYPOTHESIS: We hypothesized that emergency room physicians would miss a substantial proportion of ACL ruptures. STUDY: : Prospective comparative study. METHODS: From April 2004 through October 2004, all patients aged 15 to 55 years and presenting at the emergency department of a teaching hospital for acute knee injury without fracture or multiple injuries were included. The results of a standardized examination conducted by the emergency physicians were compared with the findings by a sports medicine specialist 5 +/- 2 days later. Magnetic resonance imaging was performed when the specialist found a positive Lachman's test and was used as the reference standard for diagnosing ACL rupture. Cohen's kappa test was used to evaluate agreement between emergency physicians and the specialist. RESULTS: Of the 79 included patients, 27 (34.2%) had a diagnosis of ACL rupture established by the specialist and confirmed by magnetic resonance imaging. Agreement was poor between emergency physicians and the sports medicine specialist regarding popping sound, instability, joint effusion, a positive Lachman's test, and a diagnosis of ACL rupture. Emergency physicians diagnosed only 7 of the 27 ACL ruptures. CONCLUSION: Emergency physicians missed a substantial proportion of acute ACL ruptures. Efforts are needed to improve their skills in diagnosing ACL rupture.

Usefulness of ultrasonographic detection of talocrural effusion in ankle sprains.

OBJECTIVE: Ankle sprain severity is difficult to assess initially in the emergency department, yet it governs treatment decisions. Ultrasonography readily shows fluid present in the talocrural joint, which is difficult to assess by physical examination. The purpose of this study was to evaluate the prevalence of ultrasonographic talocrural joint effusion in moderate and severe ankle sprains and to determine the cause of effusions by magnetic resonance imaging (MRI). METHODS: Consecutive patients 18 to 55 years of age with moderate and severe ankle sprains within the previous 48 hours were included if they had no history of abnormalities in the same ankle within the last 12 months. When ultrasonography with the ankle in the neutral position showed talocrural effusion, MRI was performed within 8 days. RESULTS: Of the 110 patients (83 men and 27 women; mean age, 24.2 years), 40 (36.4%; 95% confidence interval, 27.6%-46.1%) had joint effusion on ultrasonography and MRI. In 39 of these 40 patients, MRI visualized damage to the anterior talofibular ligament (positive predictive value, 97.5%; 95% confidence interval, 85.3%-99.9%), accompanied in 5 (12.8%) cases by damage to the calcaneofibular ligament. In 14 (35%) cases, MRI showed cartilage damage or bony contusion. CONCLUSIONS: Talocrural effusion on ultrasonography may identify patients with severe ankle sprains. Magnetic resonance imaging should be performed in patients with talocrural effusion. Further work is needed to evaluate the usefulness of MRI in acute ankle sprains without talocrural effusion.

Incidence and nature of karate injuries.

OBJECTIVES: To determine the incidence and nature of karate injuries sustained in karate clubs and to identify risk factors for injuries. METHODS: One hundred eighty-six individuals from three karate clubs in Brest, France, were entered in a retrospective study extending from September 2002 to June 2003. Each athlete was asked to complete a questionnaire on karate injuries sustained during the previous year (type, location, mechanism, exercise during which the injury occurred, number of days off training and work, and medical care). Injury types were described by number of injuries and risk factors per number of injured athletes. RESULTS: Forty-eight (28.8%) of the 186 athletes sustained 83 injuries (63 while training and 20 while competing). The annual injury rate was 44.6 per 100 athletes. Incidence rates were similar in males and females and across the three clubs but increased with age, time spent training (3.6+/-1.7 vs. 2.9+/-1.5 h/week; P=0.001), rank (lower ranks vs. brown and black belts, P=0.015), and years of practice (7.3+/-5.5 years in athletes with injuries vs. 5.1+/-4.8 in those without injuries; P=0.03). Injuries consisted of 43 (53%) hematomas, 16 (19%) sprains, seven (7%) muscle lesions, six (7%) fractures, four (5%) malaise episodes, and seven (7%) miscellaneous lesions. Time off training occurred for 26 (31.3%) injuries and ranged from 8 to >30 days. The body region involved was the head in 22 (26.5%) injuries, the torso in eight injuries (9.6%), the upper limb in 24 (28.9%) injuries, and the lower limb in 29 (35%) injuries. CONCLUSION: Karate injuries are fairly common but usually minor. They are more likely to occur during competitions than while training. The head and limbs are the main regions involved. Longer training times per week and higher rank are associated with an increased risk of injury. Prevention seems crucial.