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Identifier: radiographyxray00knox (find matches)
Title: Radiography, x-ray therapeutics and radium therapy
Year: 1915 (1910s)
Authors: Knox, Robert, 1868?-1928
Subjects: Radiography Radiotherapy
Publisher: New York, Macmillan
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons

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of loose body in the joint. These, however, are usually spokenof as foreign bodies. Rheumatoid Arthritis or Rheumatic Gout This is characterised by marked deformity in a typical case. Eadio-graphically, the articular ends of the bones present the normal degree oftranslucency, or they may be more translucent, but there are irregular,knob-like projections, some of which appear more transparent. The jointsmay become ankylosed, and there is then continuous bony structure rightthrough the joint. Hypertrophic Arthritis or Osteoarthritis This is a condition described separately, but it is probably a varietyof the preceding types, characterised by a tendency to the formation of newtissue between bone and articular cartilage, which becomes calcified. Theremay be marked disorganisation of the bones. Charcots Joints This is characterised by marked enlargement of the joint. The car-tilages are eroded, and osseous deposits occur in the ligaments, with irregularoutgrowths of bone around the joint.
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PLATE XXVIII.—Diseases and Curvature of the Spine. a, Caries of cervical vertebrae, lateral view.6, Curvature of upper dorsal spine (scoliosis).Curvature of spine, involving lower dorsal and lumbar vertebrae.d, Caries of lumbar vertebrae and sacrum. DIFFERENTIAL X-RAY DIAGNOSIS IN DISEASESOF BONES AND JOINTS It is important to be able to suggest, if only tentatively, a differentialdiagnosis in morbid conditions of bone, and, when the disease is near a joint,also of the condition of the joint. The tumours of bone most likely to com-plicate a diagnosis are (1) sarcoma, (2) cancer. The latter is generallyaccompanied by a primary lesion elsewhere, but the former frequently arisesprimarily in the periosteum (periosteal sarcoma) or in the substance of thebone (endosteal sarcoma). It is necessary to consider the appearances presented by tumours ofbone when dealing with what appears to be an inflammatory condition.The subject will be dealt with more fully later. Tumour of bone may becomplic

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