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Biomedical subjects

S Malbecq

Publications and source records attributed to S Malbecq.

5 recordsLinked to original sources
PubMed1998

[Distension of the inter-facet joints in MRI: and indirect sign of an existing underestimation of spondylolisthesis and canal stenosis].

The authors present two observations of degenerative spondylolisthesis causing canal stenosis in which the stenosis was not apparent on MRI examination, due to reduction of spondylolisthesis in the supine position. In these cases, MR images of the facet joints showed unusual large areas with hypersignal on T2 weighted images suggestive of fluid collection. Observation of such images on supine MRI images should raise the suspicion of a spondylolisthesis existing on standing examination but reduced by the supine position, possibly leading to underestimating the canal stenosis.

Female↗
PubMed1997

[Arthroplasty of the knee. Postoperative radiologic followup].

The first generation of total knee arthroplasties (TKA) had an unacceptably high failure rate due to prosthetic design problems. The current generation closely duplicates the normal anatomy of the knee. This essay describes the normal imaging appearance. First, evaluation of TKA alignment is important. The center of the knee should lie on the mechanical axis of the leg. The width and location of lucent lines (standard system by the "Knee Society") and the height of the prosthetic joint space must be noted (wear of the polyethylene). On the AP view, the tibial component should be perpendicular in relation to the tibial or up to 2 degrees of varus alignment. On the lateral view, the tibial plateau should be horizontal or should slope downward posteriorly no more than 10 degrees. Many complications of TKA can be detected radiographically (wear, descellement, complications of the patella) and corrected to prevent prosthesis failure.

Arthroplasty, Replacement, Knee↗
PubMed1992

[Lumbar arachnoid cysts: 2 unusual cases].

Two cases of arachnoid cyst in the lumbar region are described. One is intradural, acquired, and associated to severe arachnoiditis while the other is extradural in location and probably congenital. The interest of myelography, CT myelography, and MRI for the diagnosis is discussed.

Adult↗
PubMed1991

[The value of ultrasonography and computerized tomography in mandibular diseases: apropos of 2 cases of chronic fistulizing mandibular osteitis].

Though US and CT are infrequently used for the detection of mandibular disease, both techniques definitely contributed to the detection and extension work-up of fistulizing chronic mandible osteitis in our 2 patients. US clearly visualizes the mandible margin and enables detection of abnormal foramina. CT is highly valuable for the visualization of the complex (flat and curved) structure of the mandibular body and the adjacent soft tissues. While routine intraoral radiography remains necessary and sufficient in easy pathological conditions, it appears from our experience that CT and US are of unique value in detecting complex or complicated mandibular disease, in particular when involving the surrounding soft tissues.

Adolescent↗