. Tumours, innocent and malignant; their clinical characters and appropriate treatment. the frequency ofhtemorrhage within the soft and rapidly growing extravasations of blood will sometimes convert thesetumours into cysts containing blood intermixed with sarcoma-tous cells. Tumours transformed in this way were formerlydescribed as malignant blood-cysts. Although the vessels in a sarcoma are, in the main, capil-laries, nevertheless the -arteries supplying the tumour may bevery large and numerous. When a sarcoma grows from thedistal end of the femur and attains a large size,
. Tumours, innocent and malignant; their clinical characters and appropriate treatment. the frequency ofhtemorrhage within the soft and rapidly growing extravasations of blood will sometimes convert thesetumours into cysts containing blood intermixed with sarcoma-tous cells. Tumours transformed in this way were formerlydescribed as malignant blood-cysts. Although the vessels in a sarcoma are, in the main, capil-laries, nevertheless the -arteries supplying the tumour may bevery large and numerous. When a sarcoma grows from thedistal end of the femur and attains a large size, arteries sup-plying it from neighbouring muscular, periosteal, and articulartrunks become important branches, and in such circumstancesan incision into the tumour will be attended with alarminsf 62 SARCOMAS 63 haemorrhage. When attempts are made to dissect out such atumour from the Hmb instead of adopting more radicalmeasures, such as amputation, these enlarged vessels mustnot be forgotten, or they will intrude themselves upon thesurgeon in a very unmistakable manner. Arteries which. Fig. 39. —Section of lung, with nodules of sarcoma secondary to a chondi-ifyingtumour of the testis. {Museum, JRoi/al College of Surgeons.) under ordinary conditions are almost inappreciable will, whennourishing a sarcoma, attain the dimensions of the radial oreven larger trunks. Dissemination.—Sarcomas are liable to reproduce them-selves in distant organs, a phenomenon frequently referred toas metastasis. It is due to minute particles of the tumourgrowing into the venules; these, becoming detached, are 64 CONNECTIVE-TISSUE TUMOURS transported by tlie current of blood to distant organs, wherethey become arrested by the capillaries, engraft themselves,and then grow into independent tumours. This disseminationtakes place mainly through the veins, because, as alreadymentioned, sarcomas are devoid of lymphatics. The mostcommon organ in which to find secondary sarcomas is thelung (Fig. 39), unless t
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectneoplasms, bookyear19
