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We evaluated the presence, amount, and distribution of joint fluid as seen on MR images of normal and abnormal ankles.
CONCLUSION. Our results show that fluid in the articulations and tendon sheaths of the ankle is common in asymptomatic patients, and the amounts of fluid are not significantly different from the...

We have compared the findings of MRI with those of hip arthroscopy in 23 hips in young adults with hip pain. Large deep cartilage deficiencies on the acetabulum or femoral head, the percentage of femoral head cover, and the presence of marginal osteophytes seen on MRI correlated well with those...

CONCLUSION: The association between Baker cyst and joint effusion was confirmed. A relationship with meniscal tear and degenerative joint disease independent of effusion was also demonstrated. The probability of having a Baker cyst increases as the number of these associated conditions increases.
MR imaging of Baker cysts: association with internal derangement,...

CONCLUSION. On MR imaging, the asymptomatic retrocalcaneal bursa normally contains detectable high-signal-intensity fluid or synovium or both. A bursa larger than 1 mm anteroposteriorly, 11 mm transversely, or 7 mm craniocaudally is abnormal.
MR imaging of the normal and abnormal retrocalcaneal bursae. Bottger BA, Schweitzer ME, El-Noueam KI, Desai M. AJR Am J Roentgenol. 1998...

CONCLUSION: MR findings of tendinopathy and rupture of the biceps tendon are subtle. However, the combination of several MR criteria in two imaging planes makes a reasonably accurate diagnosis possible. The biceps tendon should not only be assessed in the bicipital sulcus on axial images but also on parasagittal images.
Tendinopathy...

CONCLUSION: Tendinopathy of the hip abductors and gluteus medius and minimus muscles was a common finding on MR imaging in our patients with buttock, lateral hip, or groin pain. Tendinopathy is probably a frequent cause of the greater trochanteric pain syndrome, a common regional pain syndrome that can mimic other...

OBJECTIVE: The objective of this study was to determine the presence and location of subchondral bone contusions, fractures, and "kissing" lesions of the talotibial joint after a sprain of the ankle shown on MR imaging. MATERIALS AND METHODS: We retrospectively reviewed the images of all consecutive patients who underwent MR...

Conclusion The results support the hypothesis that gluteus medius tendon pathology is important in defining GTPS. In this series, trochanteric bursal distension was uncommon and did not occur in the absence of gluteus medius pathology. The physical findings suggest that Trendelenburg's sign is the most sensitive and specific physical sign for...

We have investigated whether assessment of blood flow to the proximal scaphoid can be used to predict nonunion in acute fractures of the scaphoid. We studied 32 fractures of the scaphoid one to two weeks after injury, by dynamic fat-suppressed T1-weighted gradient-echo MRI after the intravenous administration of gadopentetate dimeglumine...

MR imaging of the menisci of the knee has proven useful for more than 10 years, with current sensitivity and specificity for meniscal tears ranging from 90% to 95% in most reports. In the past few years, advances in imaging the menisci, including appropriate imaging techniques, and in imaging of...

Magnetic resonance (MR) imaging (MRI) has the advantage of demonstrating lesions not visualized by other radiologic modalities. We present a case involving pediatric malignancy where MR-guided bone biopsy confirmed correct histologic diagnosis and was used to plan additional treatment. A 2-year, 9-month-old boy had a history of spontaneous regression of...

AJR 2003; 181:761-769 Hypointense Synovial Lesions on T2-Weighted Images: Differential Diagnosis with Pathologic Correlation José A. Narváez, Javier Narváez, Raúl Ortega1, Eugenia De Lama1, Yolanda Roca1 and Noemí Vidal
Synovial tissue that lines joint cavities, bursae, and tendinous sheaths is generally too thin to be shown on MRI. However, as synovial tissue thickens...

CONCLUSION: Both bone marrow edema and joint effusions existed with a peak occurrence in stage III disease. Bone marrow edema seems to have a stronger association with pain than does joint effusion in osteonecrosis of the femoral head.
MR imaging of bone marrow edema and joint effusion in patients with osteonecrosis...

OBJECTIVE: To evaluate, using magnetic resonance imaging (MRI), the prevalence of periarticular lesions in older persons with or without knee pain, and to assess the association of these lesions with knee pain.
CONCLUSION: Although peripatellar lesions are equally common among subjects with knee pain and those without knee pain, other periarticular...

MRI Web Clinic - May 2004 Gluteus Minimus Tear and Trochanteric Bursitis by Michael E. Stadnick, M.D.
Clinical History: 70 year-old female with chronic left hip pain. Coronal T1-weighted (A), Coronal STIR (B), and Axial T2-weighted (C) images are provided.