General and dental pathology with special reference to etiology and pathologic anatomy; a treatise for students and practitioners . stologic structures are described under this name. Sar-comatous cylindromata may be defined as sarcomata in whichhyaline and myxomatous degeneration have occurred in more orless insular collections; also as angiosarcomata with similar de-generation of the sarcomatous cells surrounding the vessels, re-sulting in either case, in branching cylinders of gelatinous ma-terial throughout the tumor. (Figs. 36, 37, and 38.) TUMORS 127 Spindle-celled Sarcomata Spindle-celle
General and dental pathology with special reference to etiology and pathologic anatomy; a treatise for students and practitioners . stologic structures are described under this name. Sar-comatous cylindromata may be defined as sarcomata in whichhyaline and myxomatous degeneration have occurred in more orless insular collections; also as angiosarcomata with similar de-generation of the sarcomatous cells surrounding the vessels, re-sulting in either case, in branching cylinders of gelatinous ma-terial throughout the tumor. (Figs. 36, 37, and 38.) TUMORS 127 Spindle-celled Sarcomata Spindle-celled sarcomata occur in dense tissues, as periosteum,tendons, fasciae, less often in loose I issues. Grossly, they areharder than the round-celled tumors, and more grayish and flesh-tinted. The cells are spindle-shaped with tapering ends andsometimes branching extremities, and apt to be arranged in par-allel rows. In the small-celled variety, the intercellular sub-stance is less fibrillar and the blood vessels more imperfect thanin the large-celled form. (Fig. 39.) When the intercellular fibrils become very evident, it is called. Fig. 39.—Spindle-cell sarcoma of the mammary gland. Oc. 3; ob. 9. (McFarland). fibrosarcoma. The so-called recurring fibroids are fibrosar-comata. Melanotic Sarcoma, or Melanomata Melanotic sarcomata, or melanomata, spring from some pig-mented tract, as the uveal tract of the eye, pigmented mole, cells contain metabolic pigment (melanin) varying greatlyin amount, and distributed uniformly or in patches. The nucleiare poor in chromatin and show a distinct network. These tu-mors are very malignant, metastasize to any tissue, but chiefly 128 GENERAL PATHOLOGY through the lymphatics to the lymph nodes. Sometimes the cellsare epithelioid and arranged in alveoli. Giant-celled Sarcomata Giant-celled sarcomata are composed of spindle or round cellswith a variable number of giant cells. They spring from themedulla of long bones, are circumscribed, and us
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpathology, bookyear19
