Hip Arthroscopy for Removal of an Acetabular Rim-Based Osteoid Osteoma and Concomitant Femoroacetabular Impingement Correction.

Minimally invasive percutaneous radiofrequency ablation (RFA) techniques are the standard of care for treating simple osteoid osteomas (OOs). Historically, OOs were treated with open en bloc resection or curettage of the nidus. RFA procedures have been linked to soft-tissue complications of varying severity.

Correlating MRI findings with disability in syndesmotic sprains of NFL players.

Background: Syndesmotic sprains may be a significant source of missed playing time, especially in football players. Advanced imaging is frequently used to confirm the clinical diagnosis. Our purpose was to evaluate the prognostic ability of MRI in predicting time of disability.

A prospective magnetic resonance imaging study of the incidence of posterolateral and multiple ligament injuries in acute knee injuries presenting with a hemarthrosis.

Purpose: The purpose of this study was to determine whether the incidence of posterolateral knee injuries, as well as other concurrent knee ligament injuries, could be obtained from a prospective evaluation of magnetic resonance imaging scans in patients with an acute knee injury with a hemarthrosis.

Methods: We prospectively documented all patients with acute (within 30 days) knee injuries with a hemarthrosis over a 90-day period who underwent 1.5-T magnetic resonance imaging at a large referral imaging facility with 6 sites, effectively covering a large metropolitan area.

Computed tomography analysis of the coracoid process and anatomic structures of the shoulder after arthroscopic coracoid decompression: a cadaveric study.

The purpose of this anatomic study is to define the morphologic changes of the coracoid and surrounding soft tissue after arthroscopic coracoid decompression. We obtained 5 fresh-frozen forequarter cadaveric specimens, 3 female and 2 male, with a mean age of 86.2 years.

Evaluation of the rotator cuff and glenoid labrum using a 0.2-Tesla extremity magnetic resonance (MR) system: MR results compared to surgical findings.

The purpose of this investigation was to evaluate the diagnostic capabilities of magnetic resonance imaging (MRI) performed using a dedicated-extremity MR system in detecting lesions of the rotator cuff and glenoid labrum. This retrospective study compared the MR results obtained in 47 patients that underwent MRI using a 0.2-Tesla extremity MR system (E-scan) to the surgical findings.

Articular cartilage injuries of the knee: evaluation and treatment options.

Articular cartilage defects of the knee can be very debilitating, and diagnosis can be difficult because the symptoms are often nonspecific. Routine MRI scans, despite vast improvement in detection techniques, are often not sensitive or specific enough, especially for low-grade lesions. Therefore, articular cartilage injuries of the knee are often a diagnosis of exclusion requiring a thorough history, a good physical exam, and a high index of suspicion.

MR imaging of the spine in sports injuries.

MR imaging has afforded an ability to better visualize and characterize a whole host of spine abnormalities encountered in the athletic population. It remains the mainstay in the noninvasive diagnosis of most soft-tissue abnormalities occurring within and about the spine. Its role in the evaluation of central spinal stenosis, the central spinal canal, and the spinal cord is unsurpassed by other noninvasive imaging modalities.

MR imaging of the shoulder after an impingement test: how long to wait.

Objective: The purpose of this study was to determine the appropriate minimum waiting time between an impingement test with subacromial injection and subsequent MR imaging to avoid misinterpretation if the injected fluid is still present.

Conclusion: MR imaging should be delayed a minimum of 24 hr after a subacromial injection. Fluid in the subacromial space 24 hr after subacromial injection is unrelated to an impingement test.

Magnetic resonance imaging of the musculoskeletal system: the spine.

Magnetic resonance imaging in the patient who has had surgery is discussed. The most common indication for postoperative imaging is in the distinction between postoperative fibrosis and recurrent disc herniation. Magnetic resonance imaging is invaluable in the assessment of potential causes of failed back surgery syndrome such as postoperative infection, arachnoiditis and adjacent segment degeneration.

Suprascapular nerve entrapment caused by supraglenoid cyst compression.

Twenty-two cases of suprascapular nerve entrapment caused by supraglenoid cyst compression were reviewed. Pain and weakness were the presenting symptoms in 14 shoulders and pain alone in 8. Twenty of the cysts were diagnosed by magnetic resonance imaging, and two were confirmed at surgical exploration.

Magnetic resonance imaging of the musculoskeletal system. Part 8. The spine, section 2.

Magnetic resonance imaging has revolutionized the noninvasive evaluation of degenerative disc disease and its complications. Compared with computed tomography and computed tomographic myelography, magnetic resonance allows specific determination of the nature of disc protrusions and other degenerative related soft tissues about the spine. Magnetic resonance offers the most complete evaluation of specific degenerative disorders including degenerative facet disease, spondylolysis, spondylolisthesis, spontaneous lumbar epidural hematomas, and juvenile discogenic disease.

Magnetic resonance imaging of the musculoskeletal system. Part 8. The spine, section 1.

Magnetic resonance has assumed a preeminent role in the imaging evaluation of the spine. Owing to its multiplanar capability and superior soft tissue contrast, magnetic resonance imaging is the procedure of choice for a host of spinal disorders including degenerative disc disease, tumor evaluation, trauma, and spinal deformities. It represents the most accurate means of distinguishing between recurrent disc herniation and epidural fibrosis, and it excels at the assessment of many postoperative abnormalities such as infection, adjacent segment disc degeneration, and arachnoiditis.

Chronically injured posterior cruciate ligament: magnetic resonance imaging.

Magnetic resonance imaging has been said to be highly reliable for diagnosis of acute posterior cruciate ligament insufficiency. In the present study, 13 patients whose posterior cruciate ligament insufficiency had been documented by magnetic resonance imaging within 10 weeks of the acute injury were recalled for a followup examination and magnetic resonance imaging. The followup interval ranged from 5 months to 4 years.

Occult osseous lesions associated with anterior cruciate ligament tears.

Occult osseous lesions occurring with anterior cruciate ligament tears have been described only recently. Twenty patients with complete anterior cruciate ligament disruptions and evidence of occult osseous lesions on their preoperative magnetic resonance (MR) images were evaluated retrospectively at 24- to 73-months' followup to document the natural history and long-term effects of the lesions. Thirty-seven initial osseous signal abnormalities were documented on the MR images of 20 patients.

MRI of the shoulder.

MRI of the shoulder is widely considered the imaging modality of choice in the evaluation of shoulder pain and the clinical impingement syndrome. This is because of its direct evaluation of all of the soft tissue structures of the subacromial space, as well as its ability to depict the relationship of the overlying osseous and soft tissue structures of the coracoacromial arch. It also provides information regarding the capsulolabral anatomy and, with the addition of MR arthrography, is becoming recognized as the imaging modality of choice for instability workup.

Radial tears of the menisci: MR findings.

Radial meniscal tears have a plane of cleavage oriented across the short axis of the meniscus in the same plane in which radial images are oriented. These tears are important to recognize, because they have clinical implications different from those of other meniscal tears with respect to meniscal function, orthopedic treatment, and clinical course. Depending on their size, location, and orientation, radial tears can have different appearances on standard MR images.

MRI findings of acute turf toe. A case report and review of anatomy.

Normal anatomy of the metatarsophalangeal joint of the hallux has been well described. However, the pathologic anatomy of turf toe, a common injury among football and rugby players, has not been documented in detail. Magnetic resonance images (MRI) of a classic case of turf toe were examined and the findings were compared with MRI of a normal specimen and correlated with known features of gross anatomy.

[Evaluation of the rotator cuff with magnetic tomography].

Rotator cuff tears are difficult to diagnose clinically, both in the acute and the chronic phase. Both conservative and surgical treatment give the best results if the injury is detected early. Magnetic resonance imaging (MRI) has recently been introduced for diagnoses of cuff tears.