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Biomedical subjects

A Abla

Publications and source records attributed to A Abla.

14 recordsLinked to original sources
PubMed1991

Syndrome of the cervical plexus caused by high cervical nerve root compression.

Lesions affecting the roots of the cervical plexus can cause a syndrome not previously described. The C3-C4 disc space is the most likely to be involved, but pressure on the C5 root can also produce facial, auricular, or retroauricular pain. Motor innervation to the diaphragm can be affected, and even the uppermost disc space at C2-C3 might be implicated. Findings on examination findings are sparse, although sensory impairment in areas of cervical plexus innervation has been observed. In a series of 1000 cervical decompression cases (both anterior and posterior) for disc disease or similar processes, only 10 instances of this syndrome have been found. Paresthesia or episodic shock-like pain affecting the ear, para-auricular, lower occipital, and mandibular areas prompted by head turning or extension are the most common complaints.

Aged↗
PubMed1990

Diagnosis and microsurgical approach to far-lateral disc herniation in the lumbar spine.

Lumbar-disc herniations that occur beneath or far lateral to the intervertebral facet joint are increasingly recognized as a cause of spinal nerve root compression syndromes at the upper lumbar levels. Failure to diagnose and precisely localize these herniations can lead to unsuccessful surgical exploration or exploration of the incorrect interspace. If these herniations are diagnosed, they often cannot be adequately exposed through the typical midline hemilaminectomy approach. Many authors have advocated a partial or complete unilateral facetectomy to expose these herniations, which can lead to vertebral instability or contribute to continued postoperative back pain. The authors present a series of 25 patients who were diagnosed as having far lateral lumbar disc herniations and underwent paramedian microsurgical lumbar-disc excision. Twelve of these were at the L4-5 level, six at the L5-S1 level, and seven at the L3-4 level. In these cases, myelography is uniformly normal and high-quality magnetic resonance images may not be helpful. High-resolution computerized tomography (CT) appears to be the best study, but even this may be negative unless enhanced by performing CT-discography. Discography with enhanced CT is ideally suited to precisely diagnose and localize these far-lateral herniations. The paramedian muscle splitting microsurgical approach was found to be the most direct and favorable anatomical route to herniations lateral to the neural foramen. With this approach, there is no facet destruction and postoperative pain is minimal. Patients were typically discharged on the 3rd or 4th postoperative day. The clinical and radiographic characteristics of far-lateral lumbar-disc herniations are reviewed and the paramedian microsurgical approach is discussed.

Humans↗
PubMed1987

Lipoma of the septum pellucidum: case report.

Intracranial lipomas are relatively rare maldevelopmental lesions that most characteristically occur in the corpus callosum. Although their occurrence in many other locations has been described, no report can be found of lipomas occurring in the septum pellucidum. A case is presented to document the occurrence of a lipoma of the septum pellucidum and to describe the magnetic resonance image appearance of an intracranial lipoma.

Adult↗
PubMed1986

Extradural spinal angiolipoma.

Two cases of extradural spinal angiolipomas are reported. The literature is reviewed and the entity of extradural spinal angiolipoma proposed. A tumor of adulthood, unassociated with bony changes, it occurs mainly in the mid-dorsal spine. Paraparesis progresses over a period of 1-2 years and may wax and wane with pregnancy or body weight changes. Characteristically, the tumor lies over the dorsal aspect of the dura, from which it may be peeled off easily. Its port-wine color contrasts strikingly with the contiguous epidural fat. A benign condition, it responds favorably to surgical excision.

Adult↗
PubMed1986

Burning hands syndrome revisited.

The burning hands syndrome of spinal cord injury was first described in 1977. The syndrome is characterized by burning dysesthesias and paresthesias in the hands and may be associated with either cervical fracture/dislocation or no detectable cervical spine abnormalities. A case of burning hands syndrome without cervical spine injury is presented in which somatosensory evoked potentials and magnetic resonance imaging were used to delineate the pathophysiology of this syndrome.

Adolescent↗
PubMed1985

Spinal cord compression in neuroblastoma.

Twelve of 80 patients suffering from neuroblastoma who were treated during a 21-year period had intraspinal involvement. Mediastinal tumors have a greater tendency to extend to the spinal canal; however, distant spread of the tumor is rare in patients presenting with intraspinal extension. Patients with intraspinal extension also survive longer than those without. Other factors affecting survival are age, stage of disease, duration of neurological symptoms, degree of histologic differentiation, and mode of therapy. In the absence of osseous metastasis, total excision of the primary lesion and its intraspinal components is usually followed by a favorable outcome; residual neurological deficits among survivors, however, are relatively common.

Child↗
PubMed1985

Microdiscectomy versus chemonucleolysis.

A retrospective analysis of 50 consecutive patients treated with chemonucleolysis and 50 treated with microlumbar discectomy was carried out. Similar clinical criteria for the diagnosis of "virgin" herniated lumbar discs were used. All patients had low back or radicular pain unrelieved by a minimum of 4 weeks of conservative therapy. Physical findings included a positive straight leg raising sign, weakness of the appropriate muscle groups, and a sensory loss or evidence of depressed reflexes. All had myelograms or computed tomographic scans demonstrating an extradural defect. Compensation cases were eliminated. Results demonstrated a 90% marked improvement in the microdiscectomy category and a 58% marked improvement in the chemonucleolysis group. Four per cent of the microdiscectomy patients were unimproved, and 18% of the chemonucleolysis group required a subsequent surgical procedure. The average postoperative hospital stay was 3 days for both groups. Because of the necessity for reoperations in the chemonucleolysis group, chemonucleolysis seemed less cost-effective than microdiscectomy.

Adolescent↗
PubMed1985

Mucocele of the pterygoid recess treated by laser surgery. Case report.

Mucoceles arising from accessory paranasal sinuses about the orbit are quite rare. A case is reported of a retro-orbital mucocele arising from the pterygoid recess of the sphenoid sinus. The clinical and anatomical presentations, computerized tomographic and magnetic resonance imaging characteristics, and laser surgical management of such lesions are described.

Adult↗
PubMed1984

Predictive value of excretory urography, ultrasonography, computerized tomography, and liver and bone scan in the staging of bilharzial bladder cancer in Saudi Arabia.

The role of ultrasonography, computed tomography (CT), and radioisotopic scanning in the staging of bilharzial bladder cancer has not been reported previously. Forty patients with invasive bladder cancer seen at the King Faisal Specialist Hospital and Research Centre between January 1978 and June 1981 underwent complete preoperative workup for staging of their tumors prior to radical cystectomy. The preoperative radiologic investigations included excretory urography (IVP), ultrasonography (US), CT of the pelvis, and liver and bone scans. The results of these investigations were compared with the operative and pathologic staging. Ninety-three percent of the patients with bilharzial cancer had evidence of ureteric obstruction on IVP compared with 22% of the nonbilharzial cancer patients. The presence of ureteric obstruction in these patients did not correlate with the stage of the disease with 83% of the patients with superficial tumors (T1 and T2) having hydroureteronephrosis. Ultrasonography and CT had an 83% accuracy in the staging of superficial tumors. Stage T3 tumors were understaged in 14% of the cases. Ultrasonography did not differentiate Stages T3 and T4 tumors while CT scan differentiated these two stages in 57% of the cases. Bone scan failed to reveal evidence of metastatic disease in any of the bilharzial cancer patients. Liver scan was suspicious for liver metastases in two patients with bilharzial cancers in whom open liver biopsy revealed only hepatic bilharziasis. Of all the radiographic studies, US or preferably CT scan seem to be of some value in the staging of bilharzial tumors localized to the bladder. Bone and liver scans are probably of no cost effective benefit.

Adolescent↗
PubMed1975

Active transport system in human spermatozoa.

The presence of potassium influx into human spermatozoa was investigated through the use of radioactive K42 and Rb86. A gradient of potassium and sodium has been found between the spermatozoal midpiece-tail region and seminal plasma. The influx of potassium seemed to correlate with spermatozoal motility.

Biological Transport, Active↗