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Biomedical subjects

M Wybier

Publications and source records attributed to M Wybier.

At least 19 recordsLinked to original sources
PubMed2006

The lucent rim: a radiographic and computed tomography sign of Paget's disease of the skull.

In seven of eight patients with osteoporosis circumscripta of the cranial vault, the pagetic bone lacunae were separated from the normal bone by a lucent rim visible on conventional radiographs and computed tomography scans. The contour of the rim was sharp on the side of the healthy surrounding bone and hazy on the side of the defect. To our knowledge, this sign has been reported in one single previous article dealing with two pagetic patients with the bisphosphonate escape phenomenon.

Adult↗
PubMed2003

[Interventional lumbar spine radiology].

Three different techniques will be discussed. The first procedure is the biopsy of the lumbar vertebra or lumbar intervertebral disc for patients with tumors or infections of the lumbar spine. The different needles that can be used in function of consistency and location of the lesion will be shown. The transpedicular and posterolateral techniques will be described. Cementoplasty for tumors and selected patients with osteoporotic vertebral collapse generates much interest. The transpedicular and posterolateral techniques will be described. Indications and complications, more frequent in patients with tumors, will be reviewed. Finally, foraminal injections of steroids in patients with radicular symptoms secondary to degenerative change will be discussed. Techniques for needle placement will be reviewed. Results from these injections will also be reviewed.

Adrenal Cortex Hormones↗
PubMed2001

Imaging of lumbar degenerative changes involving structures other than disk space.

Degenerative changes in the lumbar spine involve intervertebral disks and intervertebral posterior elements at different extents. Much less attention has been directed toward degenerative changes of the posterior vertebral elements, however, when compared with intervertebral disk degeneration. These changes may involve the apophyseal joints, the bony elements of the neural arch, the intervening soft tissues, and the spinal longitudinal ligament. Roentgenographic, CT, and MR findings in these changes are depicted.

Humans↗
PubMed2001

Ultrasound of the ankle.

Because of their size and superficial location the ankle tendons can be well evaluated with ultrasound (US). The excellent definition of the modern high frequency probes allows us to consider US the technique of first choice in their assessment. Basic US appearances correlate well with the MRI findings. Since US can diagnose most tendon disorders including tendinopathies, tears, dislocations and enthesopathies MRI is less often utilized. US can easily depict the main ankle ligaments. The basic US appearance of ligament tears is well known. US can be considered an inexpensive and accurate technique in the evaluation of ankle sprains.

Ankle↗
PubMed2000

[Osteo-articular ultrasonography of the hip and the knee].

Experience in the field of musculoskeletal diseases and advanced technology of medical sonographers allow increasing accuracy in US investigations of most lesions of both hip and knee superficial tendons. In this field, US is more and more widely replacing other imaging modalities, including MR imaging. Ultrasonography may now be used also for articular diseases purpose, including joint effusion, synovitis, intraarticular loose bodies, ligamentous injuries, articular cysts, as well as for certain osseous lesions like stress or insufficiency fractures of superficial bones. However, ultrasonography has still to be evaluated for these latter indications.

Hip Joint↗
PubMed2000

[Ultrasonography of tendons and ligaments of foot and ankle].

UNLABELLED: The main ligaments and tendons of the ankle and the hind-foot can now be studied by US. This simple and safe technic constitutes a more and more reliable alternative to MRI and CT scan. AIMS: Know the normal US appearance of the tendons and ligaments of the ankle and the hind-foot, and how to study them with US. Know their main usual pathological appearance.

Ankle Joint↗
PubMed1999

Symptomatic lumbar facet joint synovial cysts: clinical assessment of facet joint steroid injection after 1 and 6 months and long-term follow-up in 30 patients.

PURPOSE: To study the results of facet joint intraarticular steroid injections in patients with symptomatic lumbar facet joint synovial cysts. MATERIALS AND METHODS: Data from 30 patients (age range, 44-82 years; mean age, 67 years) with nerve root pain due to a lumbar facet joint synovial cyst and treated with facet joint steroid injection were retrospectively studied. On the basis of MacNab criteria, the clinical course of nerve root pain was evaluated after 1 (n = 30) and 6 (n = 28) months. Data from long-term follow-up (mean, 26 months) were also available in 14 nonsurgically treated patients. RESULTS: After 1 month, the nerve root pain outcome was excellent or good in 20 patients (67%) and fair or poor in 10 (33%). After 6 months, 10 (50%) of these 20 patients still had excellent or good results, and 18 (60%) of the 30 patients had a fair or poor clinical status, 14 of whom underwent surgery; two patients (7%) were lost to follow-up. Excellent and good results were maintained at further follow-up (range, 9-50 months). CONCLUSION: One-third of patients with symptomatic lumbar facet joint synovial cysts had long-lasting acceptable benefit from facet joint steroid injections in this study. Steroid injection should be indicated before surgery.

Aged↗
PubMed1998

Percutaneous treatments of painful shoulder.

Percutaneous treatments are useful in two, frequent, painful conditions involving the shoulder. In frozen shoulder syndrome, distention arthrography with intra-articular injection of steroid is used to provide pain relief and to improve joint motion. In rotator cuff tendon calcifications, needle aspiration of calcific deposits is used to treat pain. Surgery should be restricted to failures of needle aspiration. The techniques of these procedures are described and their results are reported.

Adult↗
PubMed1997

-Computed tomography arthrography and tendon imaging of the ankle-.

Ankle opacification dramatically increases the diagnostic value of CT examination of the foot and ankle. The procedure may be entirely performed on the CT table. The main results and indications of CT-arthrography of the ankle are presented. CT-tenography of the ankle which includes the opacification of a tendon sheath on the CT table, is also described.

Ankle Joint↗
PubMed1997

-Cervical myelography using the lumbar route-.

Cervical myelography is obtained after injection of contrast medium into the lumbar subarachnoid space through a lumbar puncture. The patient is prone with a large radiolucent block under the pelvis so that the site of lumbar puncture is at a higher level than that of the cervical spine lordosis. Lumbar contrast is injected gently so that the contrast fluid slides along the ventral aspect of the dural sac and immediately reaches the cervical subarachnoid space. Then AP and lateral (with a horizontal X-ray beam) views are obtained. The patient has to remain firmly immobilized during the whole procedure to avoid blending of the contrast medium with CSF. This procedure is safe and allows cervical myelography to reach the same quality as that obtained through cervical puncture.

Cerebrospinal Fluid↗
PubMed1997

-Arthrography of the hip-.

Painful hip with normal X-rays (including false-lateral view of both hips) is the main indication for hip arthrography, searching for focal chondropathy. In the presence of moderate hip degenerative arthritis contrasting with increasing disability, a labrum lesion must be investigated. Such lesions are of two kinds, mainly degenerative (of the superior labrum) or post-traumatic (of the posterior labrum). Arthrography allows the diagnosis of cystic changes located in the acetabulum. It also allows the diagnosis and evaluation of the extent of synovial osteochondromatosis or villonodular synovitis. In three indications, computed tomographies must be added to plain arthrography: posterior labrum lesions, osteochondromatosis (looking for foreign bodies in the acetabular fossa) and cystic changes in the acetabulum (with density measurements). In all cases, a complete conventional radiological assessment must be available. Strict asepsis must be ensured. When osteochondromatosis is suspected, evaluation of articular capacity must be systematic.

Acetabulum↗
PubMed1997

-Lesser known stress fractures-.

Stress fractures of the tibia may disclose a longitudinal orientation which is obvious at bone scanning; a mild periostosis may appear on plain films; CT demonstrates a radially-oriented fracture in one aspect of the diaphyseal cortex. A cortical dissection-like vertically oriented insufficiency fracture may involve the medial aspect of the femoral shaft underlying the lesser trochanter; the fracture is concentric to the femoral cortex at CT. Insufficiency fractures of the sacrum may be misdiagnosed on plain films; bone scanning displays a typical H-shaped increased uptake which is a specific pattern. Insufficiency fractures of the pubis may appear as tumoral bone destruction; however no soft tissue mass is present at CT which in addition demonstrates normal fat tissue abutting the osseous lesion.

Adipose Tissue↗
PubMed1997

-Morton's neuroma-.

Explore the source record for details and available documents.

Diagnosis, Differential↗
PubMed1997

[The medial collateral ligament of the knee].

Injuries of the medial collateral ligament (MCL) of the knee are easily diagnosed on clinical grounds. These lesions are generally treated conservatively. Radiological examinations are generally unhelpful. However, injuries of the MCL may be associated with those of many other ligaments of the knee in the case of complex strain of the knee so that the clinical diagnosis may be challenging; in some cases, surgical repair of associated lesions is indicated. In these cases of multiple ligamentous injuries, a radiological study of ligamentous abnormalities may be of interest. The anatomical background and the different radiological findings including those of X-rays, US, arthrography and MRI, obtained in patients with injuries of the MCL, are described; radiological differentiation of ruptures of the MCL with or without knee instability is emphasized.

Arthrography↗