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Biomedical subjects

A Chevrot

Publications and source records attributed to A Chevrot.

At least 109 records · Page 6Linked to original sources
PubMed1979

[Phalangeal osteoid osteoma (13 cases)].

Thirteen cases of osteoid osteoma of the phalanxes are reported: 10 fingers and 3 toes. Any phalanx may be affected, with no preference for a particular site, in the young adult. Segmentary tumefaction of the soft parts near the lesion is a more consistent sign than pain, which is often quite minimal. Radiographies demonstrate the increase in the size of the phalanx, whose matrix is condensed. All radiographic techniques must be used to determine the exact location of the nidus, that is always very small (1 to 2 mm), and whose total removal is the only guarantee of cure.

Adolescent↗
PubMed1978

[The radiological phenomenon of lumbar vacuum-disc (author's transl)].

Profile films of the lumbar region show the vacuum-disc phenomenon fairly frequently especially at the L5-S1 level and when there is disc degeneration. Two varieties can be distinguished : one with a well-defined enlarged medial image, and a more limited type which is often anterior, at the fibrous ring level and in contact with the vertebral plates. The latter is seen less frequently, but needs to be considered, as it precedes the changes seen in the nucleus pulposus in the intersomatic alteration. It has been shown that this image is of gaseous origin. It is caused by the liberation of gas into a newly-formed intersomatic cavity situated either in the nucleus pulposus or fibrous ring levels. The vacuum-disc phenomenon is of great diagnostic value as it is usually found in relation to degenerated discs and permits orientation of diagnosis towards classical arthrosis or Pott's pseudo-arthrosis when atypical radiological images are seen.

Adult↗
PubMed1978

[Cervical involvement in rheumatoid arthritis (author's transl)].

The authors studied 577 records of rheumatoid arthritis examined radiologically in the Department of Radiology B of Cochin Hospital: 165 patients showed evidence of lesions of the cervical spine. The risk of cervical involvement in rheumatoid arthritis is thus not negligeable: 28%. This involvement may occur at any time during the course of the disease and presents as pain or by rare and more or less slight neurological manifestations. Radiologically emphasis must be placed upon the orientation points of straight and lateral films, and the value of lateral films with the neck in flexion. Atlanto-axial dislocation is the commonest lesion, usually measured by the distance separating the anterior arch of the atlas from the odontoid peg. However, other lesions are possible, in particular involvement of the lateral masses and erosion or destruction of the odontoid. It is astonishing to discover large dislocations (of up to 10 mm) which remain well-tolerated, with minimal clinical signs. However, it is the neurological risk of quadriplegia (even though minimal) which remains the constant worry since it may result from the slightest trauma or forced movement of the neck. Fixation, usually posterior occipital C1-C2, may be indicated. It is thus necessary to carry out a routine radiological examination of C1-C2 at reasonable intervals during the clinical surveillance of a patient with rheumatoid arthritis.

Adult↗
PubMed1976

[Osseous and pulmonary sarcoidosis in a 12 year old girl. Radiological study (author's transl)].

The authors present a rather rare case of sarcoidosis in a 12 year old child. Boney involvement constitutes the first manifestation of the condition, with micro-cystic radiological appearance of the second phalanges of both third fingers. The chest X-ray demonstrated glandular and parenchymatous involvement. The diagnosis was histologically confirmed by osseous biopsy. The authors compare their case with other previously published cases.

Age Factors↗
PubMed1975

[Paget's disease and vertebral blocks (apropos of 7 cases)].

The authors observed 10 blocks of from 2 to 8 vertebrae in 7 patients whose spines were affected by Paget's disease. The morphological characteristics of these blockages were for the most part similar to those of acquired synostoses, the corresponding articular apophyses appearing to be fused in the majority of cases. Even without a radiograph taken before the formation of the blocks, the fact that there had been progression of the synostosis between certain vertebrae indicates the probability of an acquired origin. The prevalence of these vertebral blocks in a group of 76 patients suffering from Paget's disease of the spine (12 percent, or 9 patients with 13 blocks) was significantly higher than that found in a population of 200 persons not suffering from Paget's disease, (3 percent, or 6 patients with 6 blocks) and among the 13 blocks discovered in the patients with Paget's disease only 3 were formed of vertebrae unaffected by deforming osteitis. These facts suggest that the formation of a vertebral block may be favoured by Paget's disease localized in the vertebral column. This is a little recognized idea even though it was formulated in Schmorl's work at the beginning of this century.

Aged↗