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Biomedical subjects

D Resnick

Publications and source records attributed to D Resnick.

At least 415 records · Page 23Linked to original sources
PubMed1985

Plantar compartmental infection in the diabetic foot. The role of computed tomography.

This review discusses the role of computed tomography (CT) in the evaluation of extent of plantar soft tissue infection in the diabetic foot. CT abnormalities are correlated with conventional radiography, results of preoperative aspiration cultures, intraoperative assessment, and bone, gallium, and 111In-leukocyte scan findings. Plantar soft tissue disease respects compartmental boundaries in general, with transcompartmental spread possible along musculotendinous units that normally transgress the intervening fascial septae. CT correlates well with the extent of infection as determined by other modalities, but cannot precisely predict its proximal boundary due to gradual transition between unequivocally abnormal and normal tissue. CT may be useful in establishing an appropriate level for contemplated amputation and can detect extension of superficial diabetic foot infections at an earlier stage than existing clinical methods, potentially resulting in less extensive surgical procedures.

Bacterial Infections↗
PubMed1985

Frozen shoulder.

Explore the source record for details and available documents.

Arthrography↗
PubMed1985

Pressure erosions of bone in rheumatoid arthritis: a subject review.

Pressure, or compressive, erosions of bone in various locations in patients with rheumatoid arthritis are described. Possible pathophysiologic mechanisms that account for the appearance and distribution of these erosions include osteopenia, soft-tissue laxity, soft-tissue pressure on bone, bone pressure on bone, and muscular forces.

Acetabulum↗
PubMed1985

Vertebral venous channels: CT appearance and differential considerations.

A comprehensive study of the anatomy, radiologic images, and pathology of venous channels in the thoracic and lumbar vertebral bodies was performed using cadavers and patients. These structures may be mistaken for fractures, lytic lesions, or other abnormalities on high-resolution axial computed tomographic (CT) scans of the spine. A distinct osseous wall, absence of extension over multiple contiguous levels, lack of displacement, and predominant localization in the mid-axial plane of the vertebral body are characteristic features of venous channels. An understanding of the normal intraosseous venous anatomy should prevent misinterpretation of clinical CT studies in most instances.

Diagnosis, Differential↗
PubMed1985

Degenerative diseases of the vertebral column.

Several distinct degenerative processes affect the articulations of the vertebral column; each is associated with characteristic radiographic and pathologic abnormalities, and many are accompanied by significant clinical manifestations. A discussion of these processes is best accomplished according to the type of joint that is involved. With regard to cartilaginous articulations, of which the intervertebral disk is most important, intervertebral (osteo)chondrosis, spondylosis deformans, and, in the cervical spine, uncovertebral arthrosis are the major degenerative disorders. Osteoarthritis (osteoarthrosis) affects any of the synovium-lined joints of the vertebral column, including the apophyseal, costovertebral, transitional lumbosacral, median atlantoaxial, and sacroiliac articulations. Fibrous articulations, ligaments, or entheses (sites of tendon or ligament attachment to bone) are involved in diffuse idiopathic skeletal hyperostosis, ossification of the posterior spinal ligaments, and Baastrup disease. Of the many complications of these degenerative processes, alignment abnormalities (including segmental instability, degenerative spondylolisthesis, senile kyphosis, and degenerative scoliosis), intervertebral disk displacement, calcification or ossification, and spinal stenosis are the most important.

Humans↗
PubMed1985

Osseous lipoma: CT appearance.

Characteristic radiographic and computed-tomographic (CT) features of seven cases of osseous lipoma are reported: six with medullary and one with parosteal locations. Radiological diagnosis of this lesion is discussed, with emphasis on potential pitfalls in interpretation of CT scans. Although the presence of fat-equivalent density on scans is highly suggestive of osseous lipoma, comparable attenuation is documented in cases of chronic osteomyelitis and postnecrotic subchondral excavation.

Acetabulum↗
PubMed1985

Osteoarthritis of the glenohumeral joint: a radiologic-pathologic study.

Cadaveric specimens and patient radiographs were examined in order to establish the pattern and the distribution of degenerative alterations of the glenohumeral joint. Characteristic osseous changes occur in response to alterations in the articular cartilage and rotator cuff. The extent of these changes is underestimated by plain-film radiography. A strong association was found between the changes of osteoarthritis (OA) and those related to deterioration of the rotator cuff. Idiopathic OA of the glenohumeral joint was discovered in 10 (20%) of 50 symptomatic patients age 60 years and over. Theories regarding the pathomechanics and interrelations between glenohumeral joint OA and rotator cuff deterioration are discussed.

Aged↗
PubMed1985

Chronic osteomyelitis: monitoring by 99mTc phosphate and 67Ga citrate imaging.

Thirteen patients with chronic osteomyelitis, treated for 6 months with rifampin, had serial 99mTc phosphate and 67Ga scans to determine their value in assessing response to treatment. In patients who responded to treatment, gallium scans were deemed more accurate than 99mTc phosphate bone scans. The gallium scans, although still abnormal at the end of 6 months of antibiotic therapy, showed an improvement trend in all the responders except one in whom fracture recurred. Worsening or lack of improvement on gallium scans predicted active bone infection in five of six "clinical-failure" patients who had documented active bone infection. 67Ga scans eventually became normal in all patients who remained asymptomatic (excluding one with recurrent fracture). 99mTc phosphate scans became normal in only one of five clinical responders. All nonresponders had persistently abnormal scans, although after 6 months of therapy only four of seven showed worsening or no improvement on the scan. Therefore, 67Ga is preferred over 99mTc phosphate bone scans in the assessment of response to therapy in chronic bone infection. Clinical utility of the gallium scan is most significant in patients whose clinical assessment is uncertain, but routine use of this technique does not appear to be warranted. Gallium images are most valuable when obtained over a period of time, so that the trend of improvement versus nonimprovement is evident.

Chronic Disease↗
PubMed1985

Age-related alterations in the vertebral spinous processes and intervening soft tissues: radiologic-pathologic correlation.

A radiologic-pathologic correlative investigation of the normal age-related alterations in the spinous processes and intervening soft tissues was performed using cadaveric spines and both ancient and modern macerated vertebral specimens. Extreme lordosis in the cervical or lumbar spine results in spinous process apposition, formation of interspinous bursae, eburnation with osteophytosis, and creation of synovial articulations. A concomitant degenerative enthesopathy involves the supraspinous or interspinous ligamentous attachments in any spinal segment. The differential diagnosis of this phenomenon, the clinical significance of which in a given patient is controversial, includes rheumatoid and other inflammatory arthritides as well as crystal deposition disease.

Aging↗
PubMed1985

Computed tomography of the glenohumeral and sternoclavicular joints.

Cross-sectional image display and high contrast resolution of computed tomography underscore the importance of this modality in the evaluation of a wide variety of abnormalities involving the glenohumeral articulation. Computerized arthrotomography provides a more comprehensive examination of the glenohumeral joint when compared with conventional arthrotomography. Furthermore, it requires less technical expertise to perform and is better tolerated by symptomatic patients. Computerized arthrotomography appears to be an ideal imaging method for evaluation of the Hill-Sachs defect and may prove to be the best imaging technique in the assessment of abnormalities of the bicipital tendon and sheath. In addition, the cross-sectional image display and wide contrast resolution of CT are well suited to the evaluation of the sternoclavicular joint.

Adult↗
PubMed1985

Idiopathic regional osteoporosis: a clinical spectrum.

Regional migratory osteoporosis (RMO) and transient osteoporosis of the hip are entities characterized by osteopenia of periarticular bone. They are considered separate disorders because the clinical setting and pattern of joint involvement in each is reportedly different. We have observed 3 patients whose overlapping features lead us to believe that rather than being distinct entities, RMO and transient osteoporosis may be examples of the same spectrum of disease.

Adult↗
PubMed1985

A comparison of conventional radiography and computed tomography in the evaluation of spiral fractures of the tibia.

Spiral fractures of the distal third of the tibial shaft can have problems of malunion or non-union that may be related to inability to assess the quality of the initial reduction of the fracture. We created typical two-fragment torsional tibial fractures in cadaver bones. The fracture fragments were mounted in a specially constructed jig that allowed simulation of various malreduction positions including varus and valgus angulation, antecurvatum, recurvatum, malrotation, and shortening. Anteroposterior and lateral radiographs and computed tomographic scans of the specimens were made. Measurements of the fracture gap were made at defined distances along the fractures, directly on the specimens as well as on the radiographs and computed tomographic scans. Excellent correlation was obtained between measurements of the gap on the specimens and on the computed tomographic scans, but plain radiographic measurements in thirty of thirty-four instances underestimated the true width of the gap. When shortening was introduced larger maximum gaps (of as much as eighteen millimeters) as well as greater discrepancies between measurements on the scans and plain radiographs were seen. The sizes of the fracture gaps were also greater for a given degree of shortening when the pitch of the spiral fracture was greater.

Cadaver↗