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Biomedical subjects

D Resnick

Publications and source records attributed to D Resnick.

At least 433 records · Page 24Linked to original sources
PubMed1984

Hyoid bone elevation: a sign of tracheal transection.

Evaluation of traumatic neck injuries should include analysis of the position of the hyoid bone on the lateral radiograph. Location above the level of the third cervical body or a greater cornu located less than 2 cm from the angle of the mandible, or both, coupled with the finding of cervical soft-tissue air, should alert the radiologist that tracheal transection is likely and that immediate surgical exploration is required. Five cases of severe neck injury are presented.

Adolescent↗
PubMed1984

The nature of humeral pseudocysts.

In an effort to define the nature of the humeral pseudocyst, we examined a large number of macerated specimens. The area of rarefaction, located in the lateral aspect of the proximal humerus, may be a prominent radiographic finding in young individuals. In older individuals, with loss of trabecular bone in the proximal portion of the humerus, a less obvious rarefaction is present. Precise radiographic features allow differentiation of this normal finding from significant lesions in this region.

Bone Cysts↗
PubMed1984

Shoulder impingement syndrome: radiographic evaluation.

The impingement syndrome is an important source of shoulder pain that occurs when the bony and soft-tissue structures of the superior aspect of the shoulder encroach upon the coracoacromial ligamentous arch during abduction of the arm. Subacromial bursitis, bicipital tendinitis, and rotator cuff disruptions are common sequelae of this abnormality. The presence of bony excrescences arising from the anteroinferior aspect of the acromion and of flattening and sclerosis of the greater tuberosity of the humerus is an important plain radiographic sign of the impingement syndrome. Fluoroscopy, shoulder arthrography, subacromial bursography, and bursotomography are fundamental diagnostic imaging modalities in this disorder.

Acromioclavicular Joint↗
PubMed1984

Talar ridges, osteophytes, and beaks: a radiologic commentary.

Several types of osseous outgrowths that may appear on the dorsal surface of the talus are described. A normal talar ridge, located between the trochlea and distal articular surface of the talus, may hypertrophy in response to exaggerated stress. In addition, typical osteophytes may appear, indicative of osteoarthritis of the talocrural or talonavicular joint. Finally, a broad excrescence extending distally from the region of the talar ridge represents a sign of tarsal coalition. The location and the appearance of the bony outgrowths differ, allowing precise radiographic diagnosis.

Ankle Injuries↗
PubMed1984

Ankle tenography: a key to unexplained symptomatology. Part I: Normal tenographic anatomy.

Fifty cadaver ankles were examined with ankle tenography. The normal tenographic appearance of the peroneus longus and brevis, posterior tibial, flexor digitorum longus, flexor hallucis longus, anterior tibialis, extensor hallucis longus, and extensor digitorum longus tendons and sheaths are described and illustrated for clinical reference. The baseline measurements and demonstration of the normal radiographic appearance of these tendons should assist in the evaluation of hindfoot foot disability and ankle pain.

Ankle↗
PubMed1984

Replantation of digits or hands followed by destructive joint disease.

The clinical records and radiographs of 45 patients who had undergone replantation of a total hand, or a part thereof, were reviewed in order to determine the prevalence and the type of articular changes occurring distal to the site of anastomoses. In three patients, destructive joint changes were observed, consisting of bony fragmentation, spiculation, and cystic or erosive lesions. These changes, which developed between five and ten months after replantation, are most likely neuropathic or osteonecrotic in pathogenesis.

Adult↗
PubMed1984

Vertebral involvement in calcium pyrophosphate dihydrate crystal deposition disease. Radiographic-pathological correlation.

The authors conducted a comprehensive radiographic and pathological investigation of more than 1,000 postmortem spinal specimens and documented many examples of calcium pyrophosphate dihydrate crystal deposition disease (CPPD/CDD) in a variety of vertebral structures, including not only the intervertebral disk but also the apophyseal and sacroiliac joints, posterior longitudinal ligament, interspinous and supraspinous ligaments, ligamentum flavum, interosseous sacroiliac ligament, transverse atlas ligament, and posterior median atlanto-axial joint. Such crystal accumulation supports previous reports of abnormal calcification and structural damage on radiographs of the axial skeleton in patients with CPPD/CDD and may explain not only the associated spinal symptoms and signs but also spinal stenosis, spondylolisthesis, and atlanto-axial subluxation.

Calcinosis↗
PubMed1984

Computed and conventional arthrotomography of the glenohumeral joint: normal anatomy and clinical experience.

The glenohumeral joint was studied in 25 cadavers and 136 patients using computed arthrotomography (CAT) and conventional arthrotomography (AT) to assess shoulder instability. Cadaver shoulders were injected with air or latex, sectioned with a band saw, and normal articular anatomy outlined. CAT was performed in 81 patients and characterized the glenoid labrum as normal, abnormal, or detached in 38 of the 44 patients who had surgery or arthroscopy (sensitivity, 96%; accuracy, 86%). Hill-Sachs defects were seen in 20 out of 29 patients with anterior labral abnormalities, while bicipital tendon abnormalities were evident on CAT in 6. Of 55 patients who had AT, the status of the labrum was clarified in 13 of the 16 patients who had surgery or arthroscopy (sensitivity, 86%; accuracy, 81%). Both methods can characterize the labrum; however, CAT is more comprehensive and appears ideal for both detection of Hill-Sachs defects and imaging the bicipital tendon. CAT requires less technical expertise and radiation than AT and is tolerated better by patients in pain.

Adolescent↗
PubMed1984

Vertebral burst fractures: CT analysis of the retropulsed fragment.

Ten cases of retropulsed thoracolumbar vertebral body fragments that had been documented by CT were reviewed to define and characterize the nature, appearance, and position of the retropulsed fragment. All of the retropulsed fragments arose from the superior aspect of the vertebral body. Five of ten patients had a vertical fracture within the retropulsed fragment. Three of ten fragments had anteriorly rotated 90 degrees +/- 60 degrees, so that the cartilaginous end plate faced anteriorly; also, they had migrated 3-8 mm in a craniad or caudad direction. Six of ten patients had an associated vertical or Y-shaped fracture originating from the region of the basivertebral foramen and passing into the inferior one-half of the vertebral body. The presence of a retropulsed fragment is nearly pathognomonic of an axial compression injury. Characteristics of this lesion that may hinder surgical reduction are the intra-fragment fracture, rotation, and craniocaudad movement.

Humans↗
PubMed1984

Digital arthrography of the wrist: a radiographic-pathologic investigation.

An analysis of digital arthrography of the wrist was accomplished in 10 cadaveric specimens. In each case, images were obtained during a 30-sec period in which a small amount of contrast material was introduced into the radiocarpal compartment; films were reviewed with and without subtraction technique. Pathologic examination of the sectioned specimens documented the accuracy of this arthrographic method. The sequence of contrast opacification of the various compartments of the wrist and the location and size of the defects within ligamentous and cartilaginous structures were ideally seen with digital arthrography. A previously unemphasized pattern of communication, that between the midcarpal and pisiform-triquetral compartments, was seen in two instances. Digital wrist arthrography seems to represent an excellent method to evaluate the patient with suspected soft-tissue injury.

Fluoroscopy↗
PubMed1984

Hypomagnesemia with chondrocalcinosis.

Two patients are described with calcium pyrophosphate crystal deposition and hypomagnesemia. There appears to be a meaningful association between the two findings, although the precise mechanism explaining this association is not clear. The identification of chondrocalcinosis on radiographs may be an important clue to the presence of hypomagnesemia.

Adult↗