根据排便的习惯和大便的性状，就能诊断大肠癌，是真的吗？
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">从排便的习惯和大便的性状，是<span style="color: black;">能够</span>看出胃肠道肿瘤的蛛丝马迹的，请看我一一道来：</p>
<h2 style="color: black; text-align: left; margin-bottom: 10px;"><span style="color: black;">第1</span>，<a style="color: black;">便血</a><span style="color: black;">或</span>黑便</h2>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">大便的颜色是黑色的<span style="color: black;">或</span>排鲜红色的血样便，说明消化道有<span style="color: black;">流血</span>，可见于胃癌和结直肠癌。黑便说明<span style="color: black;">流血</span>量较少，血液在肠道中停留的时间较长，<span style="color: black;">平常</span>于胃癌<span style="color: black;">或</span>高位结肠癌。而排鲜红色的血样便，有时候伴有粘液，说明<span style="color: black;">流血</span>的部位距离肛门较近，<span style="color: black;">平常</span>于直肠癌和<a style="color: black;">乙状结肠</a>癌。</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://pic2.zhimg.com/80/v2-7bcb74808b8f7b2ffa168954aafd7d85_720w.webp" style="width: 50%; margin-bottom: 20px;"></div>
<h2 style="color: black; text-align: left; margin-bottom: 10px;">第二，排便习惯改变，便秘与腹泻相交替</h2>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">这<span style="color: black;">亦</span>是<a style="color: black;">大肠癌</a><span style="color: black;">平常</span>的症状，<span style="color: black;">由于</span>肿瘤在肠道中对胃肠道的刺激，可<span style="color: black;">显现</span>排便习惯的改变，<span style="color: black;">显现</span>便秘，腹泻，<span style="color: black;">或</span>便秘与腹泻相交替。</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://pic1.zhimg.com/80/v2-58db00c2f2a01dc5b5b79e3812b46b48_720w.webp" style="width: 50%; margin-bottom: 20px;"></div>
<h2 style="color: black; text-align: left; margin-bottom: 10px;">第三，大便形状改变</h2>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">肿瘤<span style="color: black;">持续</span>生长，占据肠腔的空间，大便<span style="color: black;">经过</span>的时候，可<span style="color: black;">引起</span>大便变细，排便困难，<span style="color: black;">平常</span>于直肠癌。</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://pic3.zhimg.com/80/v2-b8f3bc94db374a4f857d4cb4546b5a1a_720w.webp" style="width: 50%; margin-bottom: 20px;"></div>
<h2 style="color: black; text-align: left; margin-bottom: 10px;">第四，停止排便</h2>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><a style="color: black;">肿瘤细胞</a>进一步生长，<span style="color: black;">引起</span>肿瘤管腔完全堵塞，大便<span style="color: black;">没</span>法<span style="color: black;">经过</span>，可<span style="color: black;">引起</span>肛门停止排气排便，腹痛和腹胀等症状。</p>
<h2 style="color: black; text-align: left; margin-bottom: 10px;">第五，大便次数<span style="color: black;">增多</span>，<a style="color: black;">里急后重</a></h2>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">这个<span style="color: black;">平常</span>于直肠癌，肿瘤刺激直肠，<span style="color: black;">引起</span><span style="color: black;">病人</span>排便次数<span style="color: black;">增加</span>，排便很急迫，<span style="color: black;">然则</span>每次大变的量都很少，这种<span style="color: black;">状况</span><span style="color: black;">叫作</span>为<a style="color: black;">里急后重</a>。</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://pic4.zhimg.com/80/v2-36b0734aacc8de706f681d79b1b272eb_720w.webp" style="width: 50%; margin-bottom: 20px;"></div>
<h2 style="color: black; text-align: left; margin-bottom: 10px;">第六，大便呈陶土色</h2>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">说明肿瘤把胆管给堵塞了，胆红素<span style="color: black;">没</span>法进入肠道，可见于<a style="color: black;">胆管癌</a>，<a style="color: black;">胰腺癌</a><span style="color: black;">或</span>壶腹部的肿瘤。</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://pic4.zhimg.com/80/v2-bbb7aeb52cb91f80d7e56361e8e5aef7_720w.webp" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">按照</span>大便的性状和形状，排便习惯的改变等指标，<span style="color: black;">能够</span><span style="color: black;">发掘</span>癌症的信号，但这些都<span style="color: black;">不可</span>确诊，<span style="color: black;">必须</span><span style="color: black;">更加多</span>的<span style="color: black;">检测</span>来辅助诊断。</p>
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