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Biomedical subjects

M Wybier

Publications and source records attributed to M Wybier.

At least 55 records · Page 3Linked to original sources
PubMed1991

[A criterion of validity of the x-ray computed tomographic measurement of femoral neck anteversion].

A wrong patient's position on the CT scan table may lead to mistakes in the measurement of femoral neck anteversion. We present an experimental demonstration using a wood manufactured femur model. If the slices are performed with flexion of the thigh, the measurement is lower than the true value. Thus, to check the measurement on the picture of added slices, it is necessary to have a superimposition of the pictures of the upper part and the lower part of the femur. Otherwise, the measure is wrong and the mistake depends of the direction of the shifting: --if the lower part of the femur is higher, the anteversion measure is lower than expected. --if the lower part of the femur is lower, the anteversion measure is higher.

Femur Neck↗
PubMed1990

Vertebral hemangiomas: fat content as a sign of aggressiveness.

Thirty-two vertebral hemangiomas (VHs) were evaluated with nonenhanced computed tomography (CT), T1-weighted magnetic resonance (MR) imaging, CT enhanced with contrast material, and selective spinal arteriography. The stroma between the osseous trabeculae was found to correspond to either fatty tissue or soft tissue or both. All 11 asymptomatic VHs showed complete fatty stroma at CT and increased signal intensity at MR imaging. In contrast, all four compressive VHs had soft-tissue attenuation at CT. Three compressive VHs showed low signal intensity on MR images. Predominantly fatty stroma at CT and increased signal intensity at MR imaging were associated with normal or only slightly increased vascularization at selective spinal arteriography or contrast-enhanced CT, while soft-tissue stroma at CT and low signal intensity at MR imaging were associated with distinct hypervascularization. The authors' experience suggests that fatty VHs may represent inactive forms of VH, while soft-tissue content at CT and low signal intensity at MR imaging may indicate a more active vascular lesion with potential to compress the spinal cord. CT and MR imaging may be especially valuable for evaluating patients with clinical signs or symptoms of uncertain origin and findings compatible with VH at plain radiography.

Adipose Tissue↗
PubMed1989

Strength and cross-sectional area of the dorsal neck muscles.

The maximum isometric strength of cervical extensors was measured in a group of sixteen young healthy subjects. The cross-sectional area was obtained by computerized tomography. A significant positive correlation was found between muscle strength and cross-sectional area. The ratio of strength to cross-sectional area is 10.17N/cm2. This value is similar to that estimated on the quadriceps using similar methods in other studies. Numerous factors are suggested to explain the individual variability of the results even within a homogeneous group; among them, neck morphology is important.

Adult↗
PubMed1989

[Medical imaging and chronic backache].

The different procedures for imaging the lumbar spine are presented within a general review of chronic low back pain. Plain films still represent the main procedure: they are sufficient for common backache, the most frequent pattern of chronic low back pain. They help in determining further investigations in symptomatic low back pain, due either to spinal or non spinal conditions.

Arachnoiditis↗
PubMed1988

Solitary plasmacytoma of the spine. Long-term clinical course.

The data for 19 patients with solitary plasmacytoma of the spine were reviewed with regard to clinical course and prognosis (median follow-up, 96 months). Eight patients presented with spinal cord compression. A monoclonal immunoglobulin was initially detected in seven of 15 evaluable patients. Treatment included radiotherapy (18 of 19) and/or surgery (11 of 19) and chemotherapy (eight of 19). Spinal cord compression was reversed in every patient. The expected survival rate was 85% at 10 years after diagnosis. Local recurrence or dissemination was observed in 13 patients. It occurred within 5 years of diagnosis in 11 patients and was localized (that is, local recurrence or single bone metastasis) in eight patients. It was always associated with the appearance or an increase of the M component. Dissemination frequently had a "metastatic" pattern with no diffuse bone marrow plasmacytosis. The incidence of local recurrence (five patients) and leukemia (four patients) was high. Local recurrence and/or dissemination were significantly more frequent in patients with the M component at diagnosis than in those without it (P less than 0.05; relative risk, R = 4). The effectiveness of surgery and chemotherapy combined with radiotherapy is also discussed.

Combined Modality Therapy↗
PubMed1988

[Unilateral isthmic lysis in x-ray computed tomography].

Condensing pediculolaminar hypertrophy of mechanical origin is known as "Dahu's sign". Dahu's sign corresponds to hypertrophy of the vertebral hemi-arch found by CT scan and leads to suspicion of controlateral lysis of the isthmus. It is the CT scan equivalent of vertebral "anisocorism" by conventional radiology.

Adult↗
PubMed1988

[Lumboradiculalgia and calcified disk hernia].

In the context of a particular case report, the authors recall that calcified discs may be responsible for root pain, hyperalgic sciatica or lumbago. In the present case, the pain responded to intra-discal injection of long-acting corticosteroids. The authors compare this case to 10 other personal cases and 16 cases reported in the literature.

Calcinosis↗
PubMed1988

[The labrum acetabular. Apropos of 121 arthrographies of the hip in adults].

The authors report a retrospective study of 121 arthrographies of the hip in adults, excluding prostheses. The study was based on normal pathological values for angular measurement of the labrum acetabular: ECB angle (mean value: 15 degrees) enlarging the lateral cover of the head of the femur, VCE angle (mean value: 30 degrees) and a mean global VCB angle of 45 degrees. A certain equilibrium was observed between the covering capacity of the acetabulum and the covering capacity of the labrum acetabular. Numerous anomalies of the labrum were observed, including fissures in about 30% of cases. A large number of fissures were associated with other degenerative anomalies of the hip joint. A few fissures resulting in detachment of a strip of labrum were isolated and the possibility of their traumatic etiology and their pathogenic nature in clinical symptoms are discussed.

Acetabulum↗
PubMed1987

[Desmoid fibroma of the abdominal wall. Apropos of a case].

A case of desmoid fibroma of anterior abdominal wall, an exceptional benign tumor, is reported. Based on results of CT scan imaging of this lesion, differential diagnosis of other expansive processes of abdominal wall are discussed. This benign tumor is a potentially serious lesion due to its infiltrating character and the high incidence of recurrence. The need for total surgical excision is emphasized.

Abdominal Muscles↗
PubMed1987

[Spontaneous fracture of the sternum].

Spontaneous fractures of the sternum are unusual. They can simulate cardio-thoracic emergencies. A case of stress fracture of the sternum and of the femoral neck in a patient with corticosteroid induced osteoporosis is reported and the peculiar value of CT assessing the absence of tumoral mass is emphasized.

Female↗