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Biomedical subjects

F Zeitoun

Publications and source records attributed to F Zeitoun.

11 recordsLinked to original sources
PubMed2003

[Radiological spectrum of myositis ossificans circumscripta evolution].

Myositis ossificans circumscripta is a benign pathology of soft tissue occurring in young patients often after localized trauma. Histological and radiological appearances may mimic a malignant neoplasm, mainly sarcoma. We report a case characteristic of myositis ossificans circumscripta, to illustrate diagnostic arguments which are based on their appearance on conventional radiographs, computed tomography and magnetic resonance imaging and on their changes with time.

Adult↗
PubMed2001

[Imaging of the wrist and of the hand: what is the best modality?].

The authors describe the indications for radiologic explorations in case of traumatic as well as non-traumatic conditions. In case of trauma of the wrist, the radiologic exploration looks for a fracture, a dislocation or a ligament injury. Initially, postero-antérior and lateral views must be completed with an antero-posterior view, a scaphoid incidence and an oblique view. This initial examination can be completed secondarily by specific views for the carpal bones, dynamic X-Rays, CT scan or arthro CT scan. In non-traumatic cases, radiologic explorations look for osteo-articular or soft tissue abnormalities specific of a inflammatory or degenerative disease. The initial incidence is a postero-anterior view of both hands. It can be completed secondarly by other explorations (other X-Rays, Ultra-sound, CT scan or MRI).

Arthrography↗
PubMed1999

Hyperextension vertebral body fractures in diffuse idiopathic skeletal hyperostosis: a cause of intravertebral fluidlike collections on MR imaging.

OBJECTIVE: We describe an intravertebral fluidlike collection observed on MR images in five of six patients who sustained vertebral body fracture through a segment of the spine ankylosed by diffuse idiopathic skeletal hyperostosis. The mechanism of injury, clinical course, conventional radiographs, CT scans, and other MR imaging findings are analyzed. CONCLUSION: Intravertebral fluidlike collections were associated with hyperextension injury of the spine. Well-delineated borders, anterior widening, and associated posterior-element injury are the main MR imaging characteristics of this trauma-related intravertebral fluidlike collection.

Aged↗
PubMed1997

-Arthrography and computed tomography arthrography of the wrist-.

After a brief review of the pertinent anatomy of joint compartments and main ligaments of the wrist, the authors present the technique of wrist arthrography and CT arthrography. They discuss the normal and pathological patterns. The main indications are the chronic painful wrist and posttraumatic wrist. Imaging can reveal ligament defects (particularly scapholunate ligament, or lunotriquetral ligament), triangular fibrocartilage tears, capsular defects, cartilage thinning, foreign bodies, synovial ganglia or synovitis of the wrist.

Arthrography↗
PubMed1997

[Useful imaging data before intervention for an unstable shoulder].

Recurrent instability of the shoulder may sometimes be a difficult diagnostic challenge. Bernageau's standard X-rays set, which includes 3 antero-posterior X-rays with medial rotation and 2 glenoid views, is able to confirm the existence of anterior instability events. However, it gives no information on the glenoid labrum and the glenohumeral ligaments. As surgical techniques are more sophisticated, more precise imaging techniques are needed in order to adapt the surgical technique to the anatomical lesions. Although CT arthrography is today the best imaging technique to choose a surgical technique, it will probably be replaced by MR arthrography in the near future. Pros and cons of each imaging techniques are described, together with their implications for the choice of treatment.

Arthrography↗
PubMed1996

[Imaging of external instabilities of the patella. State of the art].

External femoropatellar instability is a dynamic abnormality from various origins: osseous, cartilaginous or musculotendinous; X-rays films cannot give a precise enough description of this phenomenon. Attention is drawn by anterior pain or a sensation of instability. Clinical analysis distinguishes between permanent, traumatic or transient dislocations which are now more frequently discovered as part of a femoro-patellar syndrome with or without cartilage involvement. Conventional imaging, CT-scan and MR imaging are based on faultless techniques. Lateral views precisely report femoropatellar architectural abnormalities and patellar instability. Skyline views are able to quantify the various parts of the dysplasia. Dynamic tests increase the sensitivity of the plain films. But the main shortcoming of these techniques is the lack of visualization of the initial patellar engagement in the trochlea. The femoropatellar component of the knee arthrography visualizes rather large cartilaginous lesions. CT-scan, better than skyline views, allows examining the patellar bone without interference with the trochlea (extended knee), during the engagement (15 degrees flexed knee) and after the engagement (30 degrees flexed knee). However, the examination technique varies from one author to another according to his own pathophysiologic understanding. With the bicondylar plane reference, the reliability of the CT-scan measurements are better than skyline views. Like the dynamic tests during the beginning of the patellar engagement at 15 degrees, flexion is more sensitive than those at 30 degrees. Finally, CT-scan arthrography demonstrates thinner cartilaginous lesions than conventional arthrography. Presently the main contribution of MR imaging consists of detecting transient patellar dislocation that a single clinical examination cannot differentiate from other internal knee disorders. MR imaging is more precise in analyzing the cartilaginous structure. Kinematic MR imaging, still in an experimental stage, offers a new approach to the dynamic study of the patellar tracking.

Humans↗
PubMed1995

[Pubalgia in sportsmen].

Pubalgia is a painful syndrome of the groin which particularly affects young athletes. Although soccer players are the athletes most often affected, they are not alone. Also included in this group are fencers, tennis players and rugbymen. This ailment is associated with varying degrees of lesions of the muscles of the lower frontal abdomen, pubic symphysis and adductor muscles. The clinical diagnosis is confirmed by standard X-rays which can show radiological anomalies of the pubic symphysis in cases of microtraumatic pubic osteo-arthropathy or insertion tendinitis. Scintigraphic anomalies occur earlier than radiological anomalies and return to normal before them; thus allowing confirmation of healing even when the radiographs are still abnormal. Sonogram and MRI can be advantageous in the detection of a lesion of the abdominal muscles or adductor muscles. MRI can also detect a lesion of the pubic symphysis. The principal differential diagnosis is pubic osteitis. Treatment is medical and combines rest, analgesics and anti-inflammatories. Surgery, namely Nesovic's operation, is reserved for those forms resistant to medical treatment, and must be bilateral.

Adult↗
PubMed1995

[Views necessary for the traumatic wrist].

Wrist injuries are an extremely common occurrence. The origin of these injuries may be due to a fracture of the two bones of the forearm or the wrist bones, which may sometimes require specific X-rays views. They are rarely responsible for a dislocation of the wrist. Strains wrists may be misdiagnosed and may result in instability of the wrist. The initial examination of all wrist injuries should systematically include the following four views: (1) a PAview of the wrist in pronation (with the palm facing downward). (2) a lateral view according to the Meyrueis technique. (3) an oblique view. (4) a scaphoid view. An additional, fifth view with the wrist in supination (with the palm facing upward) may be required. If there is clinical evidence of instability of the wrist or if the initial examination results in a probably strained wrist, a further more complete radiological examination can then be undertaken. This examination, known as "the instability examination" includes stress views, which can allow detection of a discrete instability of the wrist. Finally, it is sometimes necessary to carry out this examination in a bilateral and comparative manner.

Fractures, Bone↗
PubMed1994

[Villonodular synovitis of the knee. Contributions of MRI].

This retrospective study included eight patients with villonodular synovitis of the knee (7 nodular forms and one villous form) who underwent magnetic resonance imaging and at least one arthroscopy. Joint enlargement and mild pain were the main manifestations. Other imaging studies provided little information. Magnetic resonance imaging showed highly suggestive hemosiderin-laden masses. Hemosiderin was most clearly seen on gradient echo sequences. Magnetic resonance imaging was also useful for determining the distribution of lesions. Intravenous gadolinium provided no additional information. Arthroscopy allowed to collect biopsy specimens and to perform synovectomy when called for. In our opinion, after a physical examination and plain roentgenograms, magnetic resonance imaging and arthroscopy should both be performed to determine the extent of lesions and to allow histological diagnosis and synovectomy, respectively.

Adolescent↗