No abstract available.
Joint Capsule* ; Joints* ; Thumb*

We report on the case of double-layered medial meniscus, which was overlying anterior to mid portion of the medial meniscus. The upper accessory meniscus was connected to the anterior portion of the normal medial meniscus. And its periphery was connected to the joint capsule. The posterior portion of the upper accessory meniscus was connected to the joint capsule. This case demonstrates an interesting and rare anatomical abnormality of the medial meniscus. We report on the case with a review of the literature.
Joint Capsule ; Menisci, Tibial*

Degenerative involution of the spine causes destruction of spinal stabilizer which consists of bone, ligament, joint capsule, and disc, which substantially leads to hypermobility and instability of the spine. Generally the hard fixation system has been used for the treatment of lumbar instability. However, it has many complications, including screw loosening, screw fracture, and instability on, above, and below the fusion segment. These complications of the hard fixation system has brought to the invention of a more physiologic fixation device, the soft fixation system. We have used the Graf soft fixation system as an instrument for degenerative lumbar disease. 106 cases were operated between August, 1993 and March, 1996. The clinical assessments, radiologic findings, and operative results were analyzed. The height of disc space significantly increased from 8.84mm to 9.84mm on L3/4, 9.28mm to 10.13mm on L4/5, and 9.44mm to 10.47mm on L5/S1. Flexion instability changed from -6.9 degrees to 5.5degrees on L3/4, -7.45 degrees to 5.04 degrees on L4/5, -2.09degrees to 10.81degrees on L5/S1, translation instability was corrected from 16.8% to 14.9% on L3/4, 19.9% to 12.4% on L4/5, 27.1% to 20.1% on L5/S1 after Graf soft fixation. The clinical results were as follows: excellent in 56%, 27% good, 9% fair, and 8% poor. These results suggest that Graf soft fixation system for degenerative lumbar disease would not only be useful and effective, but also be safer in terms of unwanted complications of the hard fixation system.
Inventions ; Joint Capsule ; Ligaments ; Spine

PURPOSE: To determine the MR imaging findings of synovial sarcoma, with emphasis on the signal characteristicsof pathologically correlated T2-weighted images. MATERIALS AND METHODS: MR images of 14 cases ofpathologically-proven synovial sarcomas were retrospectively reviewed and correlated with the histopathologicfindings. We analyzed the signal intensity of T1- and T2-weighted images and the incidence of triple signalintensity, and evaluated the frequency of fluid-fluid levels, internal fibrous septa, calcification, the invasionof bone or neurovascular bundles and the involvement of joint capsules, as well as the size, location and marginof the tumors and pattern of contrast enhancement. RESULTS: Necrosis, cystic change or hemorrhage was suggested in11 cases, ten of which showed triple signal intensity, and in all cases, was pathologically confirmed. Fluid-fluidlevels were found in three cases and internal septa in ten. In four cases, maximum diameter was less than 5cm, andin nine, was greater than this. No mass was detected in one case. The tumor was located in the low extremity(n=9),pelvic girdle and hip joint area(n=2), scapular(n=1), shoulder joint area(n=1), and scalp(n=1). Eleven casesshowed a relatively well-defined margin and nine showed lobulation. Except in the area of necrosis and cysticchange, the pattern of contrast enhancement was diffuse and inhomogenous. Bony invasion was detected in two cases,neurovascular encasement in four, calcification in four, and joint capsule invasion in four. CONCLUSION: OnT2-weighted images, synovial sarcoma frequently showed triple signal intensity and internal septa with fluid-fluidlevels ; this was induced by cystic changes due to necrosis and hemorrhage.
Hemorrhage ; Hip Joint ; Incidence ; Joint Capsule ; Magnetic Resonance Imaging* ; Necrosis ; Retrospective Studies ; Sarcoma, Synovial* ; Shoulder Joint

Ganglion is a common clinical entity, usually superficial in location, therefore easily diagnosed and most common tumors of the hand which represent 50 to 70% of all soft tissue tumors of the hand. The soft mucin filled cyst is attached to the adjacent underlying joint capsule, tendon, or tendon sheath. The most common ganglion is the ganglion on the dorsal side of wrist, with its origin at the scapulolunate ligament and is usually located between the extensor digitorum communis of the index finger and the extensor pollicis longus tendons. Intratendinous ganglion is very rare lesion that originates within the tendon, which has been reported 10 cases in earliest articles and 1 case in Korean article. We report one case of ganglion that arose within the extensor digitorum communis of the middle finger.
Fingers ; Ganglion Cysts ; Hand ; Joint Capsule ; Ligaments ; Mucins ; Tendons ; Wrist

Isolated traumatic radial head anterior dislocation without associated injuries is uncommon in pediatric patients. If diagnosed on time, most cases can be reduced by closed reduction. In some cases, the radial head was found to be trapped between annular ligament, anterior joint capsule and a buttonhole tear of the brachialis muscle, preventing closed reduction. This is a very uncommon injury and the diagnosis can be overlooked. We report a case of a 7-year-old girl who sustained an irreducible isolated dislocation of the radial head which was reduced with open reduction.
Child* ; Diagnosis ; Dislocations* ; Female ; Head* ; Humans ; Joint Capsule ; Ligaments ; Tears

The sparsity of publication concerning CT findings of tuberculous arthritis prompted authors to retrospectively evaluate 12 patients with tuberculous arthritis for characteristic CT findings. In each patient, the diagnosis of tuberculous arthritis was confirmed by surgery or biopsy. The CT examinations were evaluated by two radiologists retrospectively. Involved joints were the hip joint in seven patients, the sacroiliac joint in three parients, and the shoulder and ankle joint in one patients each. CT features included subchondral bony erosion(12 patients), soft tissue mass in the joint space(nine), widenining of the joint space(eight), ipsilateral muscle atrophy(eight), thickening of the joint capsule(seven), intra-articular effusion(six), soft tissue abscess(five),and bony sclerosis(four). In seven patients with the duration of symptoms less than 1 year, thickening of joint capsule and intra-articular effusion were the predominent findings, while bony sclerosis, gross bone destruction, and soft tissue mass in joint space were seen in five patients with the duration of symptoms longer than 1 year. Our results indicate that CT is useful in the diagnosis of tuberculous arthritis by demonstrating characteristic pathologic changes of the joint space, soft tissue abnormality and bony involvement.
Ankle Joint ; Arthritis* ; Biopsy ; Diagnosis ; Hip Joint ; Humans ; Joint Capsule ; Joints ; Publications ; Retrospective Studies ; Sacroiliac Joint ; Sclerosis ; Shoulder

PURPOSE: To analyze various MR imaging findings and thus evaluate the usefulness of MR imaging of the tem-poromandibular joint in patient with acute mandibular condylar fracture. MATERIALS AND METHODS: MR imaging was performed within 1week after trauma in 25 patients (total joints s-tudied=31) in whom condylar fracture had been diagnosed by simple radiographs. We analyzed the signal intensity of bone marrow and disk, displacement of bone fragment and disk, deformity. In addition, MRI findings of retrodiskal tissue, joint capsule and joint effusion were eualuated. RESULTS: No abnormal signal intensity was noted in bone marrow or disk. Displacement of a condylar fracture fragment was observed in 24 joints(77 %) (anteromedial, 63 %; medial, 25 %; anterior, 4%; anterolateral, 4 % ; and lateral, 4 %). Disk displacement occurred in 23 joints(74 %) (anteromedial, 65 %; medial, 9 %; anterior, 18%; anterolateral, 4 %; and lateral, 4 %). In 17 joints (55 %) the disk was displaced along with the fractured condylar fragment, and disk deformity was noted in five joints(16 %). MR imaging (T2WI) revealed a capsular tear(n=1), joint effusion(n=26), and high signal intensity in the retrodiskal tissue(n=6). CONCLUSION: MR imaging provided information concerning condylar fragments, disks, retrodiskal tissue, capsules, and joint effusion. In patients with acute mandibular condylar fracture, MRI is therefore useful for evaluation of the temporomandibular joint.
Bone Marrow ; Capsules ; Congenital Abnormalities ; Humans ; Joint Capsule ; Joints ; Magnetic Resonance Imaging* ; Temporomandibular Joint*

Ganglion cysts are most common on the dorsum of the hand or wrist, but they can occur in any part of the body. There have been few papers reporting ganglion cysts originating from the sternoclavicular joint, with most of these cases developing in children. A 76-year-old woman was referred to our department because of a painless mass over the right sternoclavicular joint. The mass was excised along with the portion of the sternoclavicular joint capsule surrounding the stalk. Histopathologic examination showed the cyst wall to be composed of compressed collagen fibers without evidence of an epithelial or synovial lining, which was consistent with ganglion cyst. To our knowledge, this is the first report of such a cyst in an adult. We consider this to be a useful report for surgeons that treat mass lesions occurring in almost any part of the body surface.
Adult* ; Aged ; Child ; Collagen ; Female ; Ganglion Cysts* ; Hand ; Humans ; Joint Capsule ; Sternoclavicular Joint* ; Wrist

Ganglion cysts are tumor-like lesions in the soft tissues, generated by mucoid degeneration of the joint capsule, tendon or tendon sheaths on the dorsum of hand, wrist and foot. However, an intratendinous origin for a ganglion cyst is extremely rare. During dissection of the popliteal fossa, a cyst of 2.5 cmx2 cmx0.5 cm was observed in the tendon of right semimembranosus, 3.5 cm above the insertion of the muscle. Contrast X-ray revealed the cyst as not communicating with the knee joint or any adjacent bursae. Histopathological examination confirmed the diagnosis of ganglion cyst.
Diagnosis ; Foot ; Ganglion Cysts* ; Hand ; Joint Capsule ; Knee ; Knee Joint ; Tendons ; Wrist