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Biomedical subjects

A Chevrot

Publications and source records attributed to A Chevrot.

At least 127 records · Page 7Linked to original sources
PubMedDate not supplied

Juxtaacetabular ganglionic (or synovial) cysts: CT and MR features.

Radiographic findings include supraacetabular bone erosions, subchondral acetabular cysts, soft tissue masses with or without radiolucent inclusions representing nitrogen gas, joint space narrowing, and abnormal hip configuration. Associated tears of the acetabular labrum were confirmed by arthrography in two patients. Computed tomography and magnetic resonance imaging afforded improved delineation of soft tissue ganglia and their relationship to the acetabular bone, labrum, and hip joint. We report our experience with seven patients in whom various imaging examinations clearly documented the presence of soft tissue cystic lesions adjacent to the acetabulum; in six of the seven patients, significant clinical manifestations were evident in the affected hip. Such cysts, whether designated synovial or ganglionic in type, appear to be a frequently overlooked yet important cause of hip symptomatology.

Acetabulum↗
PubMedDate not supplied

Lumbar facet joint arthrography with the posterior approach.

Lumbar facet joint (LFJ) arthrography with intraarticular injections of long-acting steroids and local anesthetics is routinely used for therapeutic purposes in selected patients for relief of low back pain. The procedure may also be used for diagnostic reasons to establish the source of such pain. However, because direct access to the LFJ space is not always possible owing to degenerative changes such as osteophytes, another posterior approach has been proposed for LFJ arthrography. With the patient in the prone position, a spinal needle is inserted vertically into the inferior recess of an LFJ with fluoroscopic guidance and the patient under local anesthesia. To facilitate puncture, cushions are placed under the patient's abdomen to flatten normal lumbar lordosis, which enlarges the inferior recess of the LFJ. Use of cushions also results in a decrease in tissue thickness in the patient, thereby improving image quality and decreasing radiation exposure. LFJ arthrography can demonstrate the causative role of facet disease in abnormalities responsible for low back pain or sciatica and can be performed easily and rapidly with this direct posterior approach.

Anesthetics, Local↗
PubMedDate not supplied

[X-ray computed tomographic aspects of lumbar articular synovial cysts with intraspinal development].

CT scan imaging findings are described in 22 patients with lumbar spine joint synovial cysts, of intraspinal development, provoking sciatica or lumbosciatica from nerve compression in spinal canal. Diagnosis was suggested by a mass at the posterior joint level, of variable density, sometimes with peripheral calcification, presenting a vacuum appearance on occasions, and with enhanced image with contrast. Differential diagnosis is from excluded hernia and postoperative fibrosis. Posterior intraarticular arthrography can confirm diagnosis and allow treatment with prolonged action corticoid infiltrations.

Adult↗
PubMedDate not supplied

[The dural sheath in the sitting and standing position during saccoradiculography. Apropos of 150 cases].

Lateral images were studied in the sitting and standing positions during a continuous series of 150 radiculographies, in patients presenting with a symptomatology suggestive of herniated disk or lumbar stenosis. In 67% of cases the dural sac was abnormally reduced at the level of the inter-somatic spaces, due to disk protrusion or intracanalar protrusion of posterior soft tissues. In 23% of cases, an absolute canalar stenosis with anterior-posterior decrease to less than 10 mn in the standing position existed. This was due in 65% of cases to an isolated or predominant posterior impression, the latter appearing in the standing position in only 55% of cases. Saccoradiculography is the only procedure allowing study of the dural cul-de-sac in the standing position. It should be carried out if a narrow lumbar canal is suspected clinically, even if investigations in the lying position, such as CT scan or MR imaging show normal canalar dimensions.

Adolescent↗
PubMedDate not supplied

[Osteonecrosis of the femoral head. MRI study of 60 cases].

Normal and pathologic femoral heads have been studied by MRI at 1.5 Tesla. The study was centered upon avascular necrosis (53 lesions). Twenty normal subjects and three patients with algodystrophy were examined. The osteonecrosis patterns were established from known lesions. A low signal rim surrounds an upper polar zone of conserved (Type I) or decreased (Type II) signal. The lesions age correlates significantly with their type: amongst type I lesions, 6 are asymptomatic and the 21 others have a mean age of 5.5 months; Type II lesions have a mean age of 12.7 months. Fourteen lesions were not seen on plain radiographs and six were not detected by bone scan. The older lesions with femoral head deformation are better depicted by standard radiologic techniques. Conservatively MRI is the most efficient examination for recent avascular necrosis lesions.

Adolescent↗
PubMedDate not supplied

[Posterior lumbar vertebral arthrography. Normal anatomic study].

Historical aspects and anatomophysiologic features of posterior lumbar vertebral joints are summarized and results of arthrography of 55 joints presented, together with a simple, original method for performing this examination. Normal anatomic appearances condition understanding of principal lesions encountered, particularly with respect to compression of adjacent nerve structures.

Arthrography↗
PubMedDate not supplied

[Posterior lumbar vertebral arthrography. Pathologic aspects].

Findings on arthrography of posterior lumbar spine joints in 55 patients were compared with those reported in the literature. Two major degenerative lesions of these joints, diverticula and cysts, can provoke back pain and symptomatic nerve compression. Whereas diagnosis of a cyst is dependent mainly on computed tomography imaging, that of a diverticulum is ensured by arthrography, an investigation which also has a therapeutic aim since it allows infiltrations to be performed.

Arthrography↗
PubMedDate not supplied

[Radioguided puncture-infiltration in the treatment of refractory calcifying periarthritis of shoulders].

Trituration-aspiration-infiltration of calcifications of the shoulder region is a method applied for treatment of intractable calcifying periarthritis. A television screen is used to guide the needle until it is in contact with the calcifications provoking the symptoms. Trituration and aspiration of the calcified lesions is followed by saturation with prolonged released corticoids of 41 shoulders treated, recovery or improvement was noted in 70% after one month, results being rated as excellent in 19 patients followed up for 3 months.

Adrenal Cortex Hormones↗
PubMedDate not supplied

[Bone maturation and osteoarticular lesions in top level sportsmen. Apropos of 105 cases].

At the time of the European Gymnastics Championships (Lyon, 1980), X-rays of the left wrist were taken in 105 high level junior athletes. Most importantly, we found a delay in bone age in 73% of the boys and in 78% of the girls, which is probably related to an unbalanced diet and to repeated micro-trauma to the growing epiphyses. In particular, we observed traumatic lesions at the distal extremity of the radius with considerable frequency (83% of gymnasts). They are sometimes accompanied by cubital lesions and they are due to an increased fragility in the epiphyso-metaphyseal region due to the delay in bone maturation.

Adolescent↗
PubMedDate not supplied

[Radiological signs of "mixed" connective tissue disorders with anti-RNP antibodies. Report on 20 cases (author's transl)].

Case reports of 20 patients with connective tissue disorders and anti-RNP antibodies are reviewed. Specific radiological signs could not be detected : patients with minor forms do not show osteoarticular lesions; in those with congenital types of disorder the radiological anomalies are mainly those of connective tissue lesions. Clearly differentiated forms demonstrate anomalies related to the corresponding affection.

Adult↗