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Biomedical subjects

J B Ball

Publications and source records attributed to J B Ball.

25 records · Page 2Linked to original sources
PubMed1980

Prognostic features of large cell anaplastic carcinoma of the bronchus.

The clinical features of 208 patients with large cell anaplastic carcinoma of the bronchus are reviewed. Of the sample 47.6% had disseminated disease at presentation, and 95% were cigarette smokers. The median survival was 6.0 months and five-year survival was 5.9%. Twenty-seven per cent of the patients had surgical resection of tumour. The median survival of resected patients was 13.0 months and five-year-survival was 21%. Radiotherapy was ineffective in controlling the disease in this series.

Adult↗
PubMedDate not supplied

CT of mediastinal pancreatic fluid collections.

Mediastinal extension of an extrapancreatic fluid collection is a rare event. Only 30 cases have been previously reported in the literature. An additional case is presented. In the appropriate clinical setting, plain film and contrast examination of the esophagus and stomach may suggest the diagnosis. While ultrasound may identify supradiaphragmatic extension of fluid, computed tomography is better able to demonstrate the nature and extent of a mediastinal extrapancreatic fluid collection. Preoperatively it is important to recognize that a mediastinal mass represents an extrapancreatic fluid collection because the preferred surgical approach is abdominal.

Adult↗
PubMedDate not supplied

Direct sagittal computed tomography of the head in childhood.

Direct sagittal computed tomography (CT) was performed on 47 children with pathology in the posterior fossa, orbit, parasellar region, face and ear. The direct sagittal projection provided additional information about the extent of disease and relationship of the pathologic process to the adjacent tissues in 43% of patients studied. Direct sagittal CT has improved spatial resolution over reformatted images. It is readily available, less costly than magnetic resonance and can provide similar useful anatomic information.

Adolescent↗
PubMedDate not supplied

Computed tomography of single-channel cochlear implants.

Computed tomographic (CT) examinations were performed in seven patients after cochlear implant surgery. Preimplantation CT demonstrated the petrous anatomy well and revealed an abnormality in one case. Postimplantation CT adequately assessed electrode position in all cases. Malposition of the active electrode was identified in one patient. Electrode position was correlated with postimplantation audiometric testing. A "transpetrous" projection was used to image perpendicular to the active electrode within the basal turn of the cochlea. A potential pitfall was identified where the ground electrode tip appeared to be embedded in the carotid canal cortex due to partial-volume averaging. With further experience, the clinical utility of CT in cochlear implantation patients will be better defined.

Acoustic Impedance Tests↗