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Between May 1972 and December 1991, 58 children were seen in the authors' institution for treatment of Langerhans' cell histiocytosis. Of these, 15 children (7 males, 8 females) had biopsy-proven Langerhans' cell histiocytosis with vertebral involvement. The average age at presentation was 6.4 years (range, 0.2-13.3 years). At presentation, 8 patients had(More)
One hundred ten cases of the transient neurological phenomenon, cervical cord neurapraxia (CCN), are presented. The authors established a classification system for CCN, developed a new computerized measurement technique for magnetic resonance (MR) imaging, investigated the relationship of the cervical cord to the canal, and analyzed clinical, x-ray, and MR(More)
The bone mineral content (BMC) and cross-sectional properties of cadaveric radii were assessed by single photon absorptiometry (SPA). A new multiple-angle scanning technique was used in conjunction with SPA to measure the area and moments of inertia of the radial cross section in intact forearms. The radii of the same forearms were then broken in a failure(More)
The use of retrograde interlocking intramedullary nails has been described for the treatment of selected supracondylar fractures. A medial parapatellar incision and arthrotomy with its attendant morbidity is generally used for nail placement. Although a closed technique of nail placement has been described, the risks of damaging intra-articular structures(More)
During a 10-year period, 87 patients who had undergone elective colostomy closure at Bellevue Hospital were retrospectively reviewed in order to evaluate the morbidity of colostomy closure after traumatic injury and its financial impact. Sixty-two per cent of the colostomies were in the left colon and 38% were right sided. The interval from the original(More)
Recent clinical trials in osteoporotic patients show that cyclical etidronate therapy can increase vertebral bone mass and reduce the incidence of vertebral fractures. Stress generated potentials, which are theorized to participate in a negative feedback arrangement regulating bone and which are electrokinetic in origin, can be characterized in vitro by the(More)
The morphology of bone may be influenced by many factors, including electromechanical ones such as electric potentials, electric fields, or zeta potentials. Stress-generated potential studies in bone and particle electrophoresis studies using calcium-deficient hydroxyapatite have shown that the zeta potential depends on the composition of the steeping fluid(More)
OBJECTIVE The objectives of this study were to develop a software program that calculates bone cross-sectional area (CSA) and moments of inertia from digital images, test the computations for accuracy, and implement the software in a study of longitudinal changes in bone properties in a large group of postmenopausal women. MATERIALS AND METHODS A program(More)
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