Blood supply of the posterior cerebral artery by the carotid system on angiograms.

Background And Purpose: Occipital lobe infarcts are traditionally attributed to vertebrobasilar disease. However, anatomical studies indicate that in some people the supply of the posterior cerebral artery is via the carotid system. We investigated how often such a developmental variant in the cerebral blood supply was present during life.

The "dural tail sign" in MRI of spinal meningiomas.

Objective: Evaluation of "dural tail sign" in spinal meningiomas with gadolinium enhanced MRI in sagittal, axial, and especially coronal planes.

Materials And Methods: On a 0.5 T system, sagittal and axial T1 spin echo images (TR/TE 550/22) and sagittal T2 turbo spin echo images (TR/TE 2855/150) of the thoracolumbar spine were acquired.

Interobserver variability and accuracy of computed tomographic assessment of nodal status in lung cancer.

To assess the interobserver variability of computed tomography in determining nodal status in non-small cell lung carcinoma, four experienced radiologists reviewed the computed tomographic scans of 147 patients. Interobserver variability was calculated using the kappa statistic. In addition, the accuracy of CT assessment of the nodal status by the four observers was measured by comparing their findings with thorough mediastinal exploration at both mediastinoscopy (n = 35) and thoracotomy (n = 112).

Pain in scar as an early symptom of acquired thoracic lung hernia.

Hernia of the lung manifests itself as an elastic, usually replaceable, swelling in the chest wall, which changes in size during inspiration and expiration. It does not generally cause any symptoms. We describe the case history of a 49 yr old man with an acquired thoracic lung hernia, which had first presented three years previously as pain in an operation scar during coughing and lifting.