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Biomedical subjects

P Selwyn

Publications and source records attributed to P Selwyn.

7 recordsLinked to original sources
PubMed1990

Technetium-99m bone scintigraphy and mandibular condylar hyperplasia.

Radionuclide skeletal scintigraphy has been successfully used in the assessment of mandibular condylar hyperplasia (condylar hyperplasia) causing mandibular asymmetry to identify the presence of continued active growth in the condylar region. This study reviews 14 cases of mandibular asymmetry and concludes that symmetrical radionuclide uptake in the condylar regions on the bone scintigram excludes a continuing asymmetrical growth focus. Unilateral increased radionuclide uptake may often indicate an abnormally active condylar growth focus but false positive results may be encountered in patients with associated temporo-mandibular joint disease.

Adult↗
PubMed1990

A study of the prevalence and economic significance of diseases and defects of slaughtered farmed deer.

A survey was undertaken in a deer slaughterhouse to record the diseases, defects, and productivity-related information that were detectable at postmortem meat inspection. A total of 4762 farmed deer were surveyed in 1988-89 over the period of highest throughput (October-January). Comparative data were drawn from a further two deer slaughterhouses and from national disease and defect statistics for slaughtered cattle. Farmed deer had a very different disease and defect status compared to cattle. Wounds and bruises dominated the disease and defect statistics, and resulted in an average loss of 26.9% in carcass value over all cases. In addition, most chronic pathological lesions were trauma-related. Tuberculosis was the only infectious disease of importance, and the prevalence of confirmed cases (0.38%) o was significantly higher than that in slaughtered cattle in New Zealand (0.07%). Average loss in carcass value for reactors and confirmed tuberculous cases was 74.7%.

Journal Article↗
PubMed1990

A prospective comparison of neuropsychologic function in HIV-seropositive and seronegative methadone-maintained patients.

A prospective longitudinal study of neuropsychological and psychosocial functioning in a methadone-maintained population was initiated to test the hypothesis that cognitive impairments may be present early in the course of HIV infection, before the onset of other physical symptoms. A total of 220 methadone-clinic patients without evidence of HIV-related illnesses were given baseline psychological screening tests, as well as serological testing for HIV antibodies. At baseline, 83 (38%) had antibodies to HIV and 137 (62%) did not. On initial testing, controlling for race/ethnicity, age, sex and drug use, the seropositives were more cognitively impaired than the seronegatives. The differences were statistically significant for three subtests on univariate analysis: finger tapping (dominant), digit span (forward) and similarities. Ninety-one patients whose current serological status was known were given follow-up neuropsychological and psychosocial assessments after a mean interval of 7.4 months from baseline testing. At follow-up, seropositives continued to be more cognitively impaired than seronegatives, but there was no deterioration in the performance of the initial seropositives over the time interval.

Adaptation, Psychological↗
PubMed1985

Subluxation of the atlanto-axial joint.

A case of post operative atlanto-axial dislocation is presented which was diagnosed on CT scan although the clinical signs and symptoms should have suggested the diagnosis. It is recommended that all patients who present with torticollis in the early post operative period should be considered to have C1-C2 dislocation and an orthopaedic opinion should be sought.

Adolescent↗