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Biomedical subjects

D Resnick

Publications and source records attributed to D Resnick.

At least 451 records · Page 25Linked to original sources

Transscaphoid, transcapitate, perilunate fracture dislocation (scaphocapitate syndrome).

Five cases of transscaphoid, transcapitate, perilunate fracture dislocation have been presented with a discussion of the radiologic findings, mechanism of injury, and method of treatment. Although a total of only 23 cases have now been reported in the literature, this type of injury is probably not rare as we have seen two cases within a span of six months. It is important to recognize the radiologic features of this fracture dislocation so appropriate therapy may be instituted.

Adolescent↗

Crystal deposition disease.

Calcium pyrophosphate dihydrate crystal deposition disease and HA crystal deposition disease are two common disorders that may come to the attention of a physician because of a variety of clinical symptomatology patterns. In CPPD crystal deposition disease, characteristic radiologic features include articular and periarticular calcification and an arthropathy consisting of joint space narrowing, bone sclerosis, often prominent subchondral cyst formation, occasional severe and progressive destructive bone changes, and variable osteophyte formation. These findings are often seen in a characteristic distribution with involvement of non-weight-bearing as well as weight-bearing joints and with involvement of distinctive intraarticular sites such as the patellofemoral compartment of the knee and the radiocarpal compartment of the wrist. In HA crystal deposition disease, characteristic radiologic features consist of calcific tendinitis and periarthritis as well as a more recently described arthropathy. Awareness of the distinctive roentgenographic appearance of these two diseases should allow a specific diagnosis to be made, and an understanding of their pathologic features should aid in appropriate therapy and guide future investigation of possible etiologic factors.

Aged↗

Hand and wrist involvement in calcium pyrophosphate dihydrate crystal deposition disease.

The clinical records and hand and wrist radiographs of 51 patients with calcium pyrophosphate dihydrate crystal deposition disease have been analyzed, and symptomatology and radiologic abnormalities have been correlated. Characteristic roentgenographic features included cartilage and synovial calcification and arthropathy of the metacarpophalangeal joints and the radiocarpal compartment of the wrist, including scapholunate dissociation. Clinical-radiologic correlation revealed many asymptomatic patients with calcification and arthropathy and many symptomatic patients with normal radiographs. Thorough radiologic evaluation may reveal many patients with this disorder before the onset of clinical symptoms.

Aged↗

Entheses and enthesopathy. Anatomical, pathological, and radiological correlation.

Entheses are sites of tendon and ligament attachment to bone, and enthesopathy is a disease process occurring at these sites. It may be inflammatory, degenerative, endocrine, metabolic, or traumatic in nature. Common sites of involvement include the pelvis, femoral trochanter, humeral tuberosity, patella, olecranon, and calcaneus as well as portions of the vertebral column. Specific radiographic features, including bone erosion, hyperostosis, fragmentation, and crystal deposition, may allow a precise diagnosis.

Arthrography↗

Hand and wrist arthropathies of hemochromatosis and calcium pyrophosphate deposition disease: distinct radiographic features.

Radiographic features of hand and wrist involvement in 26 patients with hemochromatosis and in 26 patients with idiopathic calcium pyrophosphate dihydrate (CPPD) crystal deposition disease were compared. Two radiologists independently examined the radiographs without knowledge of the specific group to which the patient belonged. The results of this study clearly establish that structural joint diseases in the two disorders are not identical. Characteristic findings allow the radiologist to favor one diagnosis over the other. These radiographic differences indicate that the arthropathy of hemochromatosis is related to factors additional to the presence of CPPD crystals, specifically, the more prevalent narrowing of the metacarpophalangeal joint spaces, including those in the fourth and fifth digits, peculiar hook-like osteophytes on the radial aspect of the metacarpal heads, and less prevalent separation of the scaphoid and the lunate.

Adult↗

Spinal enostoses (bone islands).

Spinal enostoses are regarded as rare; they have been reported as present in approximately 1% of all spines. We have identified several patients with spinal enostoses in the thoracic and lumbar vertebral bodies. Therefore, we have initiated a prospective radiographic and pathologic investigation of enostoses, and we report the occurrence of these lesions in 14 of 100 cadavers (14%). The lesions varied in size from 2 X 2 mm to 6 X 10 mm. They were seen on radiographs of the whole specimen and of specimen sections, but only 29% of radiographs obtained prior to the death of the patient demonstrated such findings.

Aged↗

Elbow abnormalities in renal osteodystrophy.

Nine patients with renal osteodystrophy demonstrated characteristic abnormalities about the elbow consisting of subtendinous bone resorption at the sites of insertion and origin of muscles. The most striking abnormalities occurred at the insertion of the anconeus muscle, at the proximal extensor surface of the ulna, and along the posterior olecranon at the site of insertion of the triceps tendon. In three patients, the changes about the elbows were the most prominent features of hyperparathyroidism.

Adult↗

The bicipital groove: radiographic, anatomic, and pathologic study.

By using patient radiographs and pathologic specimens, the bicipital groove of the humerus was studied to determine the normal configuration and common abnormalities of this region. Factors analyzed in evaluating the bicipital groove included the medial wall angle, depth and width of the intertubercular sulcus, and presence or absence of bony spurs arising from the floor or medial wall of the groove. The supratubercular ridge was observed as an osseous protuberance in about one-half of the population; it does not seem to be of pathologic significance. A specific radiographic projection is described, which allows evaluation of the bicipital groove.

History, Ancient↗

Intracapsular pressure monitoring during arthrographic evaluation of painful hip prostheses.

Aspiration-arthrography with continuous monitoring of intraarticular pressure and volume was performed on 10 consecutive patients with painful total-hip arthroplasties. Five of these patients demonstrated clinical and arthrographic evidence of adhesive capsulitis, a condition that was associated with a dramatic rise of intraarticular pressure as increasing amounts of contrast material were introduced. The precise etiology of adhesive capsulitis is not clear.

Adult↗

Shoulder pain.

A review of conditions producing shoulder pain in the adult indicates the diverse nature of the various processes. Particularly important are diseases leading to articular abnormalities of the glenohumeral, acromioclavicular, and sternoclavicular articulations as well as surrounding structures such as the rotator cuff. Accurate diagnosis of the conditions requires careful radiographic examination supplemented with specialized techniques, including fluoroscopy, arthrography, and conventional or computed tomography.

Acromioclavicular Joint↗

Melorheostosis of the axial skeleton with associated fibrolipomatous lesions.

Two patients with melorheostotic-like lesions of the axial skeleton are described. In each case adjacent soft tissue masses containing both fatty and fibrous tissues were evident. The presence of such soft tissue tumors as well as other soft tissue abnormalities in melorheostosis emphasizes that the disease should not be regarded as one confined to bone. The precise pathogenesis of the osseous and soft tissue abnormalities in melorheostosis remains obscure.

Adult↗

Comparison of the osteoblastoma in gnathic and extragnathic sites.

A comparative analysis of extragnathic and gnathic osteoblastomas showed that the lesion was similar clinical, radiologic, and histologic features in these two sites. Osteoblastomas in both areas most commonly present as painful swellings and appear radiographically as lucent or sclerotic lesions, depending on the degree of calcification. The typical histologic appearance is of a highly vascularized stroma with osteoblasts and abundant trabeculae of osteoid and immature bone in various degrees of calcification. These lesions are most often treated conservatively by curettage or local excision. The results of this comparison indicate that oral and maxillofacial surgeons can draw on the wider experience of other types of surgeons when treating this rare lesion.

Adolescent↗