Biomedical subjects

M Y Aabed

Publications and source records attributed to M Y Aabed.

6 recordsLinked to original sources

PubMed1996

Cerebral and spinal cord myxopapillary ependymomas: a case report.

We report the case of a 16 year old male with a left temporal myxopapillary ependymoma which did not demonstrate any connection to the lateral ventricles. The patient had complained of headaches for ten months and signs of increased intracranial pressure for one month. One month post-operatively, because of lower back pain, further investigations disclosed two separate intraspinal myxopapillary ependymomas, one at T12-L1 level and the other at L5-S1 level. It is postulated that the cerebral myxopapillary ependymoma was in fact a secondary from one of the spinal cord tumors. There are only three reports of this type of ependymoma in the cerebrum.

Adolescent↗

PubMed1994

Imaging features of musculoskeletal brucellosis.

Brucellosis is endemic in certain parts of the world. Musculoskeletal involvement is the most common complication of brucellosis, and the spine is most frequently affected. Between November 1985 and March 1993, 334 patients with radiologically proved musculoskeletal brucellosis were seen. Involvement of the spine was either focal or diffuse, with a predilection to the lumbar region. Erosions and sclerosis in vertebral end plates, changes of inflammation at scintigraphy or magnetic resonance (MR) imaging, and intact disks were hallmarks of the focal form. Osteomyelitis of neighboring vertebrae, involvement of the intervening disk, and moderate epidural extension were features of diffuse brucellar spondylitis. The great majority of joints with scintigraphic evidence of disease demonstrated normal radiographic findings. Evidence of osteomyelitis or destructive arthritis was encountered in only a few cases. Although radiography is sufficient for demonstrating focal brucellosis, MR imaging is better for assessing diffuse disease.

Adolescent↗

PubMed1991

Mycetoma: comparison of MR imaging with CT.

Magnetic resonance (MR) images obtained in 18 patients with pathologically confirmed mycetoma in the body (n = 4) or lower extremity (n = 14) were retrospectively reviewed and compared with computed tomographic (CT) scans in 15 patients and surgical findings in 10. T1-weighted images showed an infiltrating mass (same signal intensity as muscle) involving skin, subcutaneous fat, muscles, tendons, and other tissues. On T2-weighted images, the mass and affected structures showed moderately increased signal intensity. Bone marrow involvement was detected in seven patients and was best visualized on T1-weighted images. CT showed moderate enhancement of the infiltrative process in all patients. Bone changes, seen in nine, included coarse trabeculation, periosteal reaction, endosteal proliferation, and patchy destruction. MR imaging and CT were comparable and correlated well with surgery in showing the extent of soft-tissue involvement. Early bone changes (important for therapy planning for pedal mycetoma) were seen only at CT. The study showed that MR imaging is sensitive for assessing the extent of mycetoma in the soft tissues. CT should be the method of choice for staging pedal lesions because it can be used to detect early bone involvement.

Adult↗

PubMed1990

Granulomatous spinal infections: MR imaging.

The value of magnetic resonance (MR) imaging in evaluating granulomatous spinal infection was retrospectively assessed in 81 patients with proved disease; 27 were reexamined after administration of gadolinium diethylenetriaminepentaacetic acid, and 25 underwent follow-up studies. Blinded interpretations were correlated with clinical, microbiologic, and surgical findings. MR imaging enabled prediction of the presence of neurologic complications in 93% of patients and diagnosis of the type of infection in 94%, and correlated well with surgical findings in 24 of 27 patients. Vertebral intraosseous abscesses, meningeal involvement, subligamentous spread, and paraspinal abscess location were best identified on contrast-enhanced studies and were seen most frequently in tuberculous spondylitis. High signal intensity on T1-weighted images of previously affected vertebrae suggested healing and correlated well with symptoms. The authors conclude that MR imaging may be useful as the method of first choice for the initial assessment and posttherapy follow-up of patients with granulomatous spinal infection.

Adult↗

PubMed1990

MR imaging of thoracic and abdominal wall infections: comparison with other imaging procedures.

Infections of the chest and abdominal wall are rare but potentially fatal disorders that can occur spontaneously or in association with diabetes mellitus, immunosuppression, or trauma. The condition (either in the form of necrotizing fasciitis and/or pyomyositis) is difficult to diagnose clinically because of poor localizing signs. Prognosis depends on early recognition, extent of disease, and type of causative organism. Pathologically, the infections can manifest as cellulitis, abscess, and/or granulation tissue formation. To determine the value of MR imaging in the assessment of these infections, we compared the findings of MR with those of CT, sonography, scintigraphy, and plain radiography in 13 patients with proved thoracic and/or abdominal wall infection. The imaging findings were correlated with microbiological, pathologic, and/or surgical data. The isolated pathogens were Staphylococcus aureus (n = 6), Klebsiella pneumoniae (n = 1), Mycobacterium tuberculosis (n = 4), and Streptomyces somaliensis (n = 2). In 10 of 13 patients, MR imaging and CT were comparable and proved accurate in detecting the nature and extent of the inflammatory process. In seven of the patients, CT also was useful in guiding percutaneous biopsy and/or partial drainage procedures. Coronal and sagittal MR images were helpful for planning surgery. Rib osteomyelitis was missed with both techniques in one patient; in two other patients who did not have CT, MR imaging missed osteomyelitis of the ribs, the spinous process of a vertebral body, and the iliac bone. Sonography underestimated the extent of the disease in all 13 patients, but detected fluid collections in six. Findings on scintigraphy and plain radiography were the least contributory to the diagnosis and treatment of these patients.(ABSTRACT TRUNCATED AT 250 WORDS)

Abdominal Muscles↗

PubMed1989

Brucellar and tuberculous spondylitis: comparative imaging features.

Radiographs, scintigrams, computed tomographic scans, and magnetic resonance (MR) images of 17 patients with brucellar spondylitis and 15 with tuberculous spondylitis were analyzed to identify distinguishing features. Characteristic findings of brucellar spondylitis included predilection for the lower lumbar spine (68% of lesions), bone destruction limited to the end plates, disk collapse (16 of 19 disks), and granulation tissue or localized soft-tissue edema (17 of 19 sites). MR imaging showed diffuse increased signal in vertebrae and disks on long repetition time (TR)/echo time (TE) images in four patients and focal increased signal with normal disks in one. Epidural extension was best seen on short TR/TE images in four. Tuberculous spondylitis was characterized by predilection for the midthoracic spine (73%), vertebral destruction with gibbus deformity (60%), disk collapse, and paraspinal abscesses (14 of 15). On MR images signal intensity of affected vertebrae was similar to but more severe than findings in patients with brucellar spondylitis. Scintigraphy was the least helpful in differentiating the two infections. Lesions of tuberculous spondylitis affecting the lower lumbar spine were difficult to differentiate from those of brucellar spondylitis.

Adult↗