. Radiography and radio-therapeutics . the articular cartilage, so that the joint escapes, althoughit may be distended with fluid. Dr. Emery, of Kings College Hospital, hasbeen good enough to report on the tumour shoAvn in Fig. 238. It consistsof a cellular matrix, composed for the most part of large, round, or oval cells,having large nuclei, sometimes multiple. There are also a few part of the tumour is sarcomatous in type. Set in this tissue arenumerous masses of cartilage, fairly well formed, but with tumour cells(like those of the matrix) instead of ordinary cartilage cell
. Radiography and radio-therapeutics . the articular cartilage, so that the joint escapes, althoughit may be distended with fluid. Dr. Emery, of Kings College Hospital, hasbeen good enough to report on the tumour shoAvn in Fig. 238. It consistsof a cellular matrix, composed for the most part of large, round, or oval cells,having large nuclei, sometimes multiple. There are also a few part of the tumour is sarcomatous in type. Set in this tissue arenumerous masses of cartilage, fairly well formed, but with tumour cells(like those of the matrix) instead of ordinary cartilage cells. The tumouris a chondro-sarcoma. Spontaneous fracture is a not uncommon complication, and owing tothe expansion of the bony framework, egg-shell crackhng may be metwith. Later, the growth may expand beyond the bony limits of the growth,and secondary deposits occur, the situations in which these are founddepending upon the type and position of the primary tumour. The lungsand mediastinum are frequently the seat of secondary •^^ Fig. 237.—Sarcoma of lower end of bone lias been sawn longitudinally in order to show thetumour in its interior. The appearance of this tumour inthe amputated limb and in the living subject are shown inPlate XLVI., Figs, c, e, and/. TUMOURS OF BONE The periosteal type of sarcoma is not at all easy to distinguish,appear as a decided shadow ofabout the density of the softparts, arising from the surface ofthe bone. It involves the soft 275 It may
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