查看“结肠癌”的源代码

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            <strong>结肠癌</strong>（Colon Cancer）是发生于盲肠至乙状结肠之间的恶性肿瘤。尽管常与直肠癌合并讨论，但结肠癌在治疗原则上（通常不需要放疗）与直肠癌有显著区别。
            <br>现代肿瘤学的一个重大发现是<strong>“左右半结肠”</strong>（Sidedness）的生物学差异。起源于中肠的<strong>右半结肠癌</strong>（盲肠、升结肠、横结肠）通常预后较差，且富含 [[BRAF]] 突变和 [[MSI-H]] 特征；而起源于后肠的<strong>左半结肠癌</strong>（降结肠、乙状结肠）预后较好，更依赖 EGFR 通路。这一发现已直接改变了晚期患者的靶向药物选择策略（如抗 EGFR 单抗更倾向于用于左半结肠）。
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            <div style="font-size: 1.2em; font-weight: bold; letter-spacing: 1.2px;">Colon Cancer</div>
            <div style="font-size: 0.7em; opacity: 0.85; margin-top: 4px; white-space: nowrap;">结肠恶性肿瘤 (点击展开)</div>
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                    <span style="font-size: 2em;">⚕️</span>
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                <div style="font-size: 0.8em; color: #64748b; margin-top: 12px; font-weight: 600;">解剖部位特异性肿瘤</div>
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                    <th colspan="2" style="padding: 8px 12px; background-color: #e0f2fe; color: #1e40af; text-align: left; font-size: 0.9em; border-top: 1px solid #bae6fd;">疾病特征</th>
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                    <th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0; width: 40%;">ICD-11编码</th>
                    <td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">2B90 (结肠恶性肿瘤)</td>
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                    <th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">手术原则</th>
                    <td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #1e40af;">全系膜切除 (CME)</td>
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                    <th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">高危因素</th>
                    <td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">红肉摄入 • 炎症性肠病</td>
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                    <th colspan="2" style="padding: 8px 12px; background-color: #e0f2fe; color: #1e40af; text-align: left; font-size: 0.9em; border-top: 1px solid #bae6fd;">临床分型</th>
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                    <th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">右半结肠</th>
                    <td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #b91c1c;">预后差 / BRAF 突变多</td>
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                    <th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569;">左半结肠</th>
                    <td style="padding: 6px 12px; color: #16a34a;">预后好 / EGFR 敏感</td>
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    <h2 style="background: #f1f5f9; color: #0f172a; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 40px; border-left: 6px solid #0f172a; font-weight: bold;">核心差异：左半 vs 右半 (Sidedness)</h2>
    
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        结肠癌的发生部位不仅仅是解剖学概念，更是胚胎学和分子生物学的分水岭。
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                <th style="padding: 12px; border: 1px solid #cbd5e1; color: #0f172a; width: 20%;">特征维度</th>
                <th style="padding: 12px; border: 1px solid #cbd5e1; color: #b91c1c; width: 40%;">右半结肠癌 (Right-Sided)</th>
                <th style="padding: 12px; border: 1px solid #cbd5e1; color: #1e40af; width: 40%;">左半结肠癌 (Left-Sided)</th>
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                <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">解剖范围</td>
                <td style="padding: 10px; border: 1px solid #cbd5e1;">盲肠、升结肠、横结肠近端 (2/3)</td>
                <td style="padding: 10px; border: 1px solid #cbd5e1;">横结肠远端、降结肠、乙状结肠</td>
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                <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">胚胎起源</td>
                <td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>中肠 (Midgut)</strong></td>
                <td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>后肠 (Hindgut)</strong></td>
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                <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">分子特征</td>
                <td style="padding: 10px; border: 1px solid #cbd5e1;">MSI-H, CIMP 高甲基化, [[BRAF]] 突变</td>
                <td style="padding: 10px; border: 1px solid #cbd5e1;">CIN (染色体不稳定), HER2/EGFR 扩增, TP53</td>
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                <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">靶向治疗</td>
                <td style="padding: 10px; border: 1px solid #cbd5e1;">抗 EGFR 单抗效果<strong>差</strong> (无论 RAS 状态)</td>
                <td style="padding: 10px; border: 1px solid #cbd5e1;">抗 EGFR 单抗效果<strong>好</strong> (若 RAS/BRAF WT)</td>
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    <h2 style="background: #f1f5f9; color: #0f172a; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 40px; border-left: 6px solid #0f172a; font-weight: bold;">治疗降阶梯：IDEA 研究带来的变革</h2>
    
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        对于 III 期结肠癌患者，术后辅助化疗的标准时长一直是 6 个月。然而，<strong>IDEA 国际联合分析</strong> 对此提出了挑战，旨在减少奥沙利铂带来的累积性神经毒性。
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            <li style="margin-bottom: 12px;"><strong>低危 III 期 (T1-3, N1)：</strong> 推荐将辅助化疗缩短至 <strong>3 个月</strong>（尤其是使用 CAPOX 方案时）。数据显示 3 个月疗效非劣效于 6 个月，且神经毒性显著降低。</li>
            <li style="margin-bottom: 12px;"><strong>高危 III 期 (T4 或 N2)：</strong> 仍建议进行完整的 <strong>6 个月</strong> 化疗（FOLFOX 或 CAPOX），因为复发风险较高，缩短疗程可能会牺牲生存获益。</li>
            <li style="margin-bottom: 0;"><strong>手术技术 (CME)：</strong> <strong>全结肠系膜切除术 (CME)</strong> 是结肠癌手术的金标准，类似于直肠癌的 TME。它强调沿胚胎解剖层面完整切除包裹肿瘤血管和淋巴结的系膜，能显著降低局部复发率。</li>
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        <span style="color: #0f172a; font-weight: bold; font-size: 1.05em; display: inline-block; margin-bottom: 15px;">学术参考文献 [Academic Review]</span>
        
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            [1] <strong>Venook AP, et al. (2017).</strong> <em>Impact of Primary Tumor Location on Overall Survival and Progression-Free Survival for Patients With Metastatic Colorectal Cancer: Analysis of CALGB/SWOG 80405.</em> <strong>[[Journal of Clinical Oncology]]</strong>. <br>
            <span style="color: #475569;">[点评]：确立了“原发肿瘤部位（左右半）”是转移性结肠癌独立预后因素和疗效预测因子的关键研究。</span>
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            [2] <strong>Grothey A, et al. (2018).</strong> <em>Duration of Adjuvant Chemotherapy for Stage III Colon Cancer.</em> <strong>[[New England Journal of Medicine]]</strong>. <br>
            <span style="color: #475569;">[点评]：著名的 IDEA 汇总分析，改变了低危 III 期结肠癌的临床实践，支持将部分患者的化疗从 6 个月缩短至 3 个月。</span>
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            [3] <strong>Hohenberger W, et al. (2009).</strong> <em>Standardized surgery for colonic cancer: complete mesocolic excision and central ligation--technical notes and outcome.</em> <strong>[[Colorectal Disease]]</strong>. <br>
            <span style="color: #475569;">[点评]：外科经典文献，定义了全结肠系膜切除术 (CME) 的技术标准，提升了结肠癌手术的规范化水平。</span>
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            结肠癌 · 知识图谱
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                <td style="width: 85px; background-color: #f8fafc; color: #334155; font-weight: 600; padding: 10px 12px; text-align: right; vertical-align: middle;">上级分类</td>
                <td style="padding: 10px 15px; color: #334155;">[[结直肠癌]] (CRC) • 消化道肿瘤</td>
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                <td style="width: 85px; background-color: #f8fafc; color: #334155; font-weight: 600; padding: 10px 12px; text-align: right; vertical-align: middle;">区分疾病</td>
                <td style="padding: 10px 15px; color: #334155;">[[直肠癌]] (需考虑全直肠系膜切除 TME 及放疗)</td>
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                <td style="width: 85px; background-color: #f8fafc; color: #334155; font-weight: 600; padding: 10px 12px; text-align: right; vertical-align: middle;">关键药物</td>
                <td style="padding: 10px 15px; color: #334155;">[[奥沙利铂]] • [[氟尿嘧啶]] • [[贝伐珠单抗]]</td>
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