American practice of surgery : a complete system of the science and art of surgery . riders boneand exercise bone that sometimes develop in the adductors of the femora andin the deltoid, and, possibly, also the extensive and progressive ossification of theconnective tissue of the nmscle in the curious disease known as myositis ossificans. 316 AMERICAN PRACTICE OF 8URGERY. Myomata. !Myomata arc tumors consisting chiefly of muscle fibres. Two varieties canbe recognized, those composed of striated muscle, rhabdomyoma (mjoma strio-cellularc), antl those formed of unstriped nmscle, leiomyoma (myoma
American practice of surgery : a complete system of the science and art of surgery . riders boneand exercise bone that sometimes develop in the adductors of the femora andin the deltoid, and, possibly, also the extensive and progressive ossification of theconnective tissue of the nmscle in the curious disease known as myositis ossificans. 316 AMERICAN PRACTICE OF 8URGERY. Myomata. !Myomata arc tumors consisting chiefly of muscle fibres. Two varieties canbe recognized, those composed of striated muscle, rhabdomyoma (mjoma strio-cellularc), antl those formed of unstriped nmscle, leiomyoma (myoma kvvicel-lulare). The rhabdomyoma (von Zenker) is a somewhat rare form, the peculiar featureof which is tluit it is composed of more or less embryonic or undifferentiatedstriated-muscle cells. The cells of more adult type occur as multinucleatedribbon-like masses of protoplasm of Aarying thickness, presenting well-markedtransverse striation and sometimes also longitudinal fibrillation. The more im-mature cells are in A-arious stages of differentiation. There are round cells, pos-. FiG. 92.—Fibro-myoma ( Fibroid ) of the Uterus. The darker tissue consists oi unstriped muscle ;the lighter, of fibrous tissue. Winckel No. 3, without ocular. (From the authors collection.) sessing no special peculiarities, that are scarcely, if at all, to be distinguishedfrom the earliest forms of connective-tissue cells; irregularly rounded or ovalcells, presentmg radial or concentric striations; spindle cells having long process-es, with or without a faint striation; and small ribbon-like masses of proto-plasm without striir. The bands and spindles are aggregated into bundles andinterlace more or less freely. To gross appearance, there is nothing specially characteristic of the rhabdo-myomata. They form nodular growths, and, if on a free surface, may have apapillomatous or pol3poid arrangement. It is important to recognize the fact that the rhabdomyoma is a tumor of em-bryonic type. Its cells alw
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