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    [病理學(xué)]診斷肉瘤的主要形態(tài)依據(jù):

    原題:
    [病理學(xué)]診斷肉瘤的主要形態(tài)依據(jù):
    選項(xiàng):
    A.包膜消失
    B.浸潤生長
    C.瘤細(xì)胞異型性明顯
    D.瘤細(xì)胞彌漫分布與間質(zhì)分界不清
    E.血行轉(zhuǎn)移

    答案:
    D
    解析:
     

    答復(fù):本題選D。

                                                 癌                                                                                           肉瘤

    組織來源                         上皮組織                                                                                  間葉組織

    發(fā)生率                        常見,80%左右                                                                       較少見,20%左右

    年齡                                中年以上                                                                                青少年多見

    部位                       皮膚、粘膜、內(nèi)臟多見                                                                   四肢、軀干多見

    大體形態(tài)            灰白色,細(xì)顆粒狀,干燥,質(zhì)較硬                                          粉紅色,細(xì)膩,魚肉狀,質(zhì)較軟

    組織學(xué)特點(diǎn)  癌細(xì)胞成卵巢狀、腺管狀、索狀排列。實(shí)質(zhì)與間質(zhì)分界清楚              瘤細(xì)胞彌漫排列,與間質(zhì)混雜

    網(wǎng)狀纖維                  癌細(xì)胞間無網(wǎng)狀纖維                                                                 瘤細(xì)胞之間有網(wǎng)狀纖維

    轉(zhuǎn)移方式                        淋巴道為主                                                                                  血道為主