. Tumours, innocent and malignant; their clinical characters and appropriate treatment. con-cerned, fairly symmetrical. Otto Weber recorded a remark-able case of numerous symmetrical exostoses of the longbones of the upper and lower limbs, the ribs, and scapulain a man 25 years old. A chondro-sarcoma arose in the righthip-bone and attained enormous proportions. It perforatedthe left external iliac vein, and pieces of the tumour, detachedas emboli, lodged in the pulmonary artery. Exostoses.—It has been customary to describe all kinds 38 CONNECTIVE-TISSUE TUMOURS of tumours composed of bone, or
. Tumours, innocent and malignant; their clinical characters and appropriate treatment. con-cerned, fairly symmetrical. Otto Weber recorded a remark-able case of numerous symmetrical exostoses of the longbones of the upper and lower limbs, the ribs, and scapulain a man 25 years old. A chondro-sarcoma arose in the righthip-bone and attained enormous proportions. It perforatedthe left external iliac vein, and pieces of the tumour, detachedas emboli, lodged in the pulmonary artery. Exostoses.—It has been customary to describe all kinds 38 CONNECTIVE-TISSUE TUMOURS of tumours composed of bone, or bone-like tissue, under thename of exostoses. The term exostosis should be limited toirregular outgrowths of bone to which the term tumour is notin any sense applicable. The various bony outgrowths classedas exostoses fall into three groups :— 1. Ossification of tendons at their attachments. 2. The subungual exostosis. 3. Calcification of inflammatory exudations. 1. Exostoses formed hy ossification of tendons at theirattachments.—The lono- bones of a child at birth are smooth. Fig. 19.—Cancellous osteoma of the scapula. {HCuseuni of the Eoyal College of Siirgeons.) in outline and almost cylindrical in shape; the periosteum isrelatively thick, and gives attachment to the muscles. On ex-amination of the long bones of an adult muscular man theirshafts are found to be irregular, and present many asperities,such as the linea aspera, gluteal ridge (sometimes called thethird trochanter), oblique lines, and the like. These ridgesand lines, in the majority of instances, are the ossified inser-tions of muscles; occasionally they are so pronounced as OSTEOMAS 39 to be appreciable through the soft structures, and are thendescribed clinically as exostoses. The two most frequentexamples of this form of exostosis are the adductor tubercle ofthe femur and the tubercle on the first rib at the insertion ofthe scalenus anticus. Probably the most common exostosisis that which occurs in the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectneoplasms, bookyear19
