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Biomedical subjects

K A Ibrahim

Publications and source records attributed to K A Ibrahim.

7 recordsLinked to original sources
PubMed1989

A study of the junction between the straight sinus and the great cerebral vein.

In the present study 20 human brains were used to verify the presence of a small body projecting into the floor of the straight sinus at its junction with the great cerebral vein. The elevation could be identified at the anterior end of the floor of the straight sinus with an empty cavity underlying it. Histologically, the elevation was found to consist of interwoven bundles of collagen fibres covered by vascular endothelium continuous with that of the straight sinus. The importance of such an elevation in the regulation of blood flow from the great cerebral vein to the straight sinus is discussed from a hydrodynamic point of view.

Adult↗
PubMed1980

Quantitative and histomorphological studies on the geniculate ganglion of the facial nerve in man.

The human geniculate ganglion was studied histologically and quantitatively. It appeared pyramidal in shape. The mean diameter of the side of the triangle constituting its base was 1,050 micrometer and its mean height 1,800 micrometer; the volume of the ganglion was 26 X 10(7) micrometer 3. The ganglionic cells were arranged in clusters with longitudinally extending bundles of nerve fibres in between. At the apex of the ganglion compact neurons were delineated from those in the rest of the ganglion by a bundle of nerve fibres. Moreover, scattered solitary nerve cells were met with between fibres of the greater petrosal and the chorda tympani nerves. The mean neuronal population was 1,070, the mean cell volume 11,913 micrometer 3, the cell territory 242,990 micrometer 3 and the volume of the intercellular space 231,077 micrometer 3. Extraganglionic vessels approximated the ganglion perpendicular to its long axis, while further intraganglionic vessels extended in a direction parallel to the long axis of the ganglion and vertical terminal ramifications formed dense vascular channels around the capsule of the nerve cells. The significance of that pattern of blood supply was discussed.

Chorda Tympani Nerve↗
PubMed1977

The surgical gallbladder.

A series of 412 personally performed cholecystectomies is analyzed and discussed. Surgical cases were divided into groups based on whether or not the gallbladder was visualized by cholecystography. A third group required immediate surgery without attempting radiologic investigation. We do not accept the diagnosis of dyskinesia which is a radiological finding as an indication for surgery and no such cases are included in the series. Quite a number of cases operated on for "chronic cholecystitis" were found at surgery to have other less common pathological lesions, as proved by later histologic examination of the excised gallbladders. Bilharzial gallbladder disease is discussed and the new terms bilharzial cholecystitis and bilharzioma of the gallbladder are suggested for the lesions described. We stress the need to explore, inspect and aspirate the common bile duct in every case of calculous cholecystitis as the only alternative to operative cholangiography. By so doing biliary fistulas were completely eliminated from the series.

Adult↗
PubMedDate not supplied

Rare tumors of the intestines and rectum.

Some rare tumors of the intestines and rectum (eight cases) have been presented and discussed. All were successfully managed without operative mortality. I have presented some observations deduced from these cases which might aid in the diagnosis of such rare tumors--the importance of palpating the terminal ileum in any abdominal operation and the necessity for a frozen section biopsy from suspicious schistosomal masses of the sigmoid colon or the rectum before deciding to resect them. I have discussed cases of carcinoma of the rectum where microscopic schistosomal deposits were spotted and stressed that in such cases it is a mere coincidental association.

Adenocarcinoma↗