Biomedical subjects
P Cotty
Publications and source records attributed to P Cotty.
[Lumbar lordosis: radiological classification and biomechanical consequences].
Various radiological parameters were measured on a lateral film taken in erect position of the lumbar spine in 55 patient with low back pain. These various parameters had inter-, intra-observer and inter-study variation coefficients of less than 3%. In patients with a positive Fergusson index ("low" or inferior lordosis), mean values of the angle of lordosis and of obliqueness of the lower vertebral plateau of L5 in relation to the horizontal were higher than in patients with a negative Fergusson index ("high" or superior lordosis), this being statistically significant. In view of the correlations found between the various parameters measured and this classification, the biomechanical consequences, which have their role to play in the management of patients with low back pain, are discussed.
Diagnostic imaging of the temporomandibular joint.
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[Subscapular conflict. Apropos of a case].
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The temporomandibular joint in rheumatoid arthritis. Correlations between clinical and computed tomography features.
Clinical and computed tomography (CT) examination of the temporomandibular joint (TMJ) was performed in 26 patients with rheumatoid arthritis (RA) and 26 control subjects. Each examination was scored. In the group with RA 61.2% had physical signs in the stomatognathic system compared to 42.3% in a control group (NS); 88.4% of the group with RA had erosive or cystic lesions of the TMJ compared to 57.6% of control subjects (p less than 0.05). The clinical dysfunction score did not correlate with the CT TMJ score in RA. It correlated with the number of slow acting antirheumatic drugs used, the rheumatoid factor titer and radiographic scores of the hands and cervical spine. In agreement with others, we believe that the only specific CT lesions of RA are erosions and cysts of the mandibular condyle, that there is no correlation between clinical and CT findings of TMJ in RA, and that the intensity of destructive lesions of TMJ on CT in RA is well correlated with the severity of the disease.
Progressive necrosis of the conus medullaris: magnetic resonance imaging and surgical findings.
A 67-year-old man with non-insulin-dependent diabetes mellitus progressively developed, over a 2-year period, lower extremity sensory and motor defects associated with impaired bladder function and perineal and perianal sensation related to a disease of the conus medullaris extending from T12 to S5. The magnetic resonance imaging scan suggested myelomalacia and the diagnosis of progressive necrotic myelopathy was confirmed by surgical intervention.
[Tomographic aspects of the temporomandibular joint (TMJ). Comparative study of 30 subjects with rheumatoid arthritis and 30 normal subjects].
From a prospective study, two populations are compared: 30 Healthy subjects with 30 subjects suffering from rheumatoid arthritis. Two conclusions are statistically significant: --The temporo-mandibular joint is affected like the other joints in the rheumatoid arthritis, --the lesions are often bilateral. Two radiographic aspects, are most often observed: the erosion and the lacuna.
Direct coronal computed tomography of the temporomandibular joints in rheumatoid arthritis.
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Chronic cervical radiation myelopathy diagnosed by MRI.
We report a case of chronic cervical myelopathy which developed after radiotherapy for differentiated carcinoma of the buccal cavity. The myelopathy was diagnosed by the finding of severe cervical cord atrophy at MRI.
Insufficiency fractures of the sacrum. Ten cases and a review of the literature.
We report ten cases of insufficiency fracture of the sacrum, a recently individualized pathological entity. These fractures occur in elderly women with pronounced osteopenia of the pelvis. The clinical symptoms are low back pain and sometimes mechanical radiculalgia. Histories of previous injury are rare. In 50 per cent of the cases X-ray films of the pelvis show fractures of the anterior pelvic arch (iliopubic and ischiopubic rami). Computerized tomography or radionuclide bone scanning provide an almost certain diagnosis of sacral insufficiency fracture. This diagnosis is confirmed by a favorable clinical outcome after 2 months.
[Congenital absence of a pedicle of the thoracic vertebrae. A new case].
The authors report a case of congenital absence of pedicle in the thoracic spine which is uncommon. The lesion may occur at three stages of vertebral development: membranous, cartilaginous or osseous. Careful examination of the X-rays allows visualisation of pedicle aplasia or hypoplasia, associated with controlateral and posterior arch lesions, confirming the congenital origin. Computed tomography scan allows careful analysis of the lesions and eliminates others causes of absence of pedicle, avoiding invasive and expensive explorations.
[Chronic intermittent dialysis and cervical spine involvement. A cross-sectional study of 55 cases].
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[Cervical spondylolisthesis of congenital origin. Apropos of a case, review of the literature].
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[Rupture of the rotator cuff. Quantification of indirect signs in standard radiology and the Leclercq maneuver].
The roentgenograms and the "Leclercq's manoeuvre" of 105 patients who had a shoulder arthrography were reviewed. We differentiated two groups: One with a rotator cuff tear. The other without a rotator cuff tear. The space between the acromion and the head of the humerus was measured on rotation zero degree and external rotational roentgenograms. When the acromio-humeral space was less than 8 mm, it was always correlated with a rotator cuff tear (specificity = 1). If at least tow of the following signs were present, there was in most cases a rotator cuff tear (specificity = 0.96): Sclerosed acromion. Spur of the acromion. Cystic changes around the greater tuberosity. Rounded tuberosities. Inferior gleno-humeral spur. The "Leclercq's manoeuvre" was considered positive either when there was an acromio-humeral space narrowing compared with the other side, or when there was an upward subluxation of the head of the humerus. When positive there was always a rotator cuff tear (sensibility = 0.7; specificity = 1).
Vertebral osteomyelitis: value of percutaneous biopsy. 30 cases.
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Persistence of circulating complexes between HBsAg and immunoglobulin M in sera of hepatitis B surface antigen positive patients suffering from liver cirrhosis or primary liver cancer.
Complexes between hepatitis B surface antigen (HBsAg) and immunoglobulin M (IgM) have been detected in acute type B hepatitis. Sequential serum testing for the presence of these complexes has been shown to be the best method for predicting disease chronicity. The presence of HBsAg/IgM complexes was investigated using an enzyme-linked immunosorbent assay with selected sera from Senegal. The three population groups studied were composed of 405 Senegalese soldiers as well as 84 liver cirrhosis and 169 primary liver cancer patients. Only one of the 122 HBsAg negative sera tested was found to be positive for HBsAg/IgM complexes. Complexes were detected 13.9% of the HBsAg positive soldiers, in 40% of the HBsAg positive liver cirrhosis patients, and in 50% of the HBsAg positive primary liver cancer patients. HBsAg/IgM complexes were also detected in 53.6% of the hepatitis B e antigen (HBe) positive soldiers, compared to 75 and 76% for the HBeAg positive liver cirrhosis and primary liver cancer patients, respectively. In anti-HBe positive sera, an increased proportion of HBsAg/IgM complexes was observed during the sequence chronic hepatitis (5%)-cirrhosis (29%)-primary liver cancer (42%). On the other hand, it has been reported that in the sequence of events leading from chronic hepatitis to primary liver cancer, there is an increase in anti-HBeAg prevalence and in alpha-fetoprotein levels. In this study, only alpha-fetoprotein levels were found to increase. Values higher than 15 IU/ml were observed in 4.3, 27.3, and 86.4% of the HBsAg positive individuals from the three groups. No significant variation was observed in the anti-HBe prevalence between the population group (64-75%).
Real-time ultrasonography in detection of primary liver cancer in intertropical Africa.
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