结果：21例出血的病因中，血管畸形7例，平滑肌瘤8例，溃疡性结肠炎4例，克隆氏病2例。

Results: In 21 cases, the bleeding causes included vascular ectasias (7 cases), leiomyoma (8 cases), ulcerative colitis (4 cases) and Crohn's disease (2 cases).

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结果：21例出血的病因中，血管畸形7例，平滑肌瘤8例，溃疡性结肠炎4例，克隆氏病2例。

Results: In 21 cases, the bleeding causes included vascular ectasias (7 cases), leiomyoma (8 cases), ulcerative colitis (4 cases) and Crohn's disease (2 cases).

youdao