Medial patellofemoral ligament injury patterns and associated pathology in lateral patella dislocation: an MRI study.

BACKGROUND: Lateral Patella dislocations are common injuries seen in the active and young adult populations. Our study focus was to evaluate medial patellofemoral ligament (MPFL) injury patterns and associated knee pathology using Magnetic Resonance Imaging studies. METHODS: MRI studies taken at one imaging site between January, 2007 to January, 2008 with the final diagnosis of patella dislocation were screened for this study. Of the 324 cases that were found, 195 patients with lateral patellar dislocation traumatic enough to cause bone bruises on the lateral femoral trochlea and the medial facet of the patella were selected for this study. The MRI images were reviewed by three independent observers for location and type of MPFL injury, osteochondral defects, loose bodies, MCL and meniscus tears. The data was analyzed as a single cohort and by gender. RESULTS: This study consisted of 127 males and 68 females; mean age of 23 yrs. Tear of the MPFL at the patellar attachment occurred in 93/195 knees (47%), at the femoral attachment in 50/195 knees (26%), and at both the femoral and patella attachment sites in 26/195 knees (13%). Attenuation of the MPFL without rupture occurred in 26/195 knees (13%). Associated findings included loose bodies in 23/195 (13%), meniscus tears 41/195 (21%), patella avulsion/fracture in 14/195 (7%), medial collateral ligament sprains/tears in 37/195 (19%) and osteochondral lesions in 96/195 knees (49%). Statistical analysis showed females had significantly more associated meniscus tears than the males (27% vs. 17%, p = 0.04). Although not statistically significant, osteochondral lesions were seen more in male patients with acute patella dislocation (52% vs. 42%, p = 0.08). CONCLUSION: Patients who present with lateral patella dislocation with the classic bone bruise pattern seen on MRI will likely rupture the MPFL at the patellar side. Females are more likely to have an associated meniscal tear than males; however, more males have underlying osteochondral lesions. Given the high percentage of associated pathology, we recommend a MRI of the knee in all patients who present with acute patella dislocation.

Anatomical reconstruction for chronic lateral ankle instability in the high-demand athlete: functional outcomes after the modified Broström repair using suture anchors.

BACKGROUND: Modification of the Bröstrom repair with suture anchors has been used to address chronic lateral ankle instability. However, there are few studies in the literature reporting the functional outcomes after this particular procedure in the high-demand athlete. HYPOTHESIS: Anatomical reconstruction of the lateral ankle ligaments for chronic instability will return the high-demand athlete functionally to his or her previous level of activity. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Sixty-two patients who had grade III ankle sprain that failed at least a 6-month course of supervised conservative management with a preinjury Tegner score of > or = 6 underwent a variant of the Gould-modified Broström procedure with suture anchors for lateral ankle instability. Each patient was given the Tegner and Karlsson questionnaire at the 6-month, 1-year, and 2-year time points. Range of motion of the operative ankle was also assessed. The mean age was 19.6 years (range, 16-26 years), and 10 patients were lost to follow-up. RESULTS: The mean follow-up was 29 months (minimum, 24 months) in the remaining 52 patients (84%). Mean Tegner scores at the 1- and 2-year time points were 8.2 (range, 5-9) and 8.6 (range, 5-9), respectively. The mean Karlsson scores were 92 +/- 5.2 and 95 +/- 3.1 at the 1- and 2-year time points, respectively. Range of motion was equal to the contralateral ankle in all but 3 patients at the 2-year follow up. A 6% major complication rate included 3 reruptures. CONCLUSION: Anatomical ligament reconstruction for chronic lateral ankle instability using a variant of the Gould-modified Broström procedure with suture anchors was effective in returning high-demand athletes to their preinjury functional level.

Congenital instability of the shoulder joint: assessment and treatment options.

UNLABELLED: Congenital instability of the shoulder is a form of multidirectional instability not caused by a traumatic event. It is believed that excess laxity may be responsible for an overly elastic capsule and, therefore, can contribute to multidirectional instability. Minor microtraumatic events can progressively lead to the development of pain and lead to instability. The current preferred treatment is largely nonoperative with extensive rehabilitation of the dynamic restraints of the shoulder complex. In recalcitrant cases, operative intervention to restore stability may be necessary. It is of paramount importance to notice the directions of instability and to address each of them. Surgical procedures include open capsular shift, as well as arthroscopic capsular plication. Because multidirectional instability can be difficult to diagnose, this article will attempt to provide the clinician with a better understanding of the pathophysiology involved in this condition, the necessary steps for diagnosis, and considerations for treatment. A comprehensive guide to both nonoperative and operative treatment is reviewed in this article, as well as the surgical techniques used to decrease the capsular volume. LEVEL OF EVIDENCE: Level 5.

The proximal biceps tendon: tricks and pearls.

The diagnosis and treatment of proximal biceps tendon injuries continue to be a challenge. The difficulty lies on determining if there is isolated biceps pathology versus concomitant rotator cuff tears or instability. Imaging modalities, such as magnetic resonance imaging, continue to provide us with the extra tool to help us confirm our suspicion of additional pathology. Symptomatic biceps tendon tears can undergo debridement, tenotomy, or tenodesis if nonoperative measures fail to provide relief. Reports from performing a biceps tenotomy often give similar functional outcomes compared with tenodesis. Cosmetic deformity on the lateral arm may be noted with tenodesis and initial fatigue. Tenodesis may subject the patient to a longer rehabilitation process and increased pain. The decision of which one should be performed lies between the physician and the patient's expectations.