Biomedical subjects
Publications and source records attributed to N S Hibri.
CT scans demonstrated a localized collection of gas adjacent to a normal sacroiliac joint in 5 patients. In each case the lesion was sharply demarcated by a thin sclerotic rim. A benign bone cyst was confirmed histologically in 2 cases. The radiologist should be aware of this appearance so as to avoid invasive procedures based on a misdiagnosis of infection or neoplasm.
Four cases of optic disk drusen were accurately diagnosed with orbital computed tomography (CT). The radiologist should be aware of the characteristic CT finding of discrete calcification within an otherwise normal optic disk. This benign process is easily differentiated from lesions such as calcific neoplastic processes of the posterior globe. CT identification of optic disk drusen is essential in the evaluation of visual field defects, migraine-like headaches, and pseudopapilledema.
Ten symptomatic patients with skeletal abnormalities of varying etiology at the craniovertebral junction were studied with gas or metrizamide myelography. The type of compressive pathology was accurately delineated by these techniques. The surgical approach was determined by the findings on the myelograms.
Lumbar epidurography is a useful adjunct procedure for the investigation of disk disease. The use of epinephrine enhances the value of this procedure by delaying the absorption of metrizamide, allowing thorough plain radiograph evaluation and time to perform tomography.
Cerebellar hemangioblastomas were seen in seven persons, five being members of the same family. All were studied with constrast enhanced CT scans and vertebral angiograms. The CT scans were superior for demonstrating the cystic component of the tumors and associated hydrocephalus, features not usually evident on the angiograms. The angiograms were superior for revealing the vascular nature, supply and drainage of the tumors. In several patients the angiograms revealed more tumors than could be seen by CT. Both CT and angiography contribute important information in the diagnosis of these neoplasms.