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微浸润腺癌 - 版本历史
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<strong>微浸润腺癌</strong>（Minimally Invasive Adenocarcinoma, MIA）是一种预后极佳的早期[[肺腺癌]]。根据 2011 年 IASLC/ATS/ERS 的国际分类标准，MIA 被定义为孤立性的、总直径 &le; 3cm 的小腺癌，其显微镜下的浸润性成分（实性生长、腺泡样或乳头状生长）最大径 <strong>&le; 5mm</strong>。影像学上，它通常表现为<strong>[[混合磨玻璃结节]]</strong>（mGGN），其中实性成分微小。MIA 代表了从原位癌（AIS）向浸润性腺癌（IAC）过渡的关键阶段，若能完整切除，患者的 5 年无复发生存率接近 <strong>100%</strong>。<br />
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<div style="font-size: 1.2em; font-weight: bold; letter-spacing: 1.2px;">微浸润腺癌 (MIA)</div><br />
<div style="font-size: 0.7em; opacity: 0.85; margin-top: 4px; white-space: nowrap;">Minimally Invasive Adenocarcinoma (点击展开)</div><br />
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[[Image:MIA_histopathology_invasion_focus.jpg|100px|病理示贴壁生长背景下的微小浸润灶]]<br />
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<div style="font-size: 0.8em; color: #64748b; margin-top: 12px; font-weight: 600;">病理特征：浸润灶 &le; 5mm</div><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0; width: 40%;">肿瘤总径</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">&le; 3 cm</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0;">核心标准</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #b91c1c;">浸润深度 &le; 5 mm</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0;">生长方式</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">贴壁生长为主 (Lepidic)</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0;">影像对应</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #1e40af;">[[mGGN]] (实性成分<5mm)</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0;">淋巴转移</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #16a34a;">理论上无转移风险</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f1f5f9; color: #475569;">首选治疗</th><br />
<td style="padding: 6px 12px; color: #0f172a;">[[亚肺叶切除]] (楔形/肺段)</td><br />
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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;">黄金标准：5mm 的界限</h2><br />
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MIA 的诊断是严格的病理学排他性诊断。要确诊为 MIA，必须同时满足以下条件：<br />
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<li style="margin-bottom: 12px;"><strong>尺寸限制：</strong> 肿瘤总大小 &le; 3 cm，且任何浸润焦点的最大径 &le; 5 mm。</li><br />
<li style="margin-bottom: 12px;"><strong>“四无”原则（排除标准）：</strong><br />
<br>1. 无<strong>淋巴管、血管</strong>侵犯。<br />
<br>2. 无<strong>胸膜</strong>侵犯。<br />
<br>3. 无<strong>肿瘤坏死</strong>。<br />
<br>4. 无经气腔播散（[[STAS]]）。<br />
<br>注：一旦出现上述任何一种情况，即使浸润灶 < 5mm，也必须升级诊断为<strong>[[浸润性腺癌]]</strong> (IAC)。</li><br />
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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;">谱系演进：从安全到危险</h2><br />
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<th style="padding: 12px; border: 1px solid #cbd5e1; color: #0f172a; width: 25%;">病理分型</th><br />
<th style="padding: 12px; border: 1px solid #cbd5e1; color: #475569;">浸润深度</th><br />
<th style="padding: 12px; border: 1px solid #cbd5e1; color: #1e40af;">5年生存率 (切除后)</th><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">[[原位腺癌]] (AIS)</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">0 mm (纯贴壁生长)</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1; color: #16a34a;">100%</td><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600; background-color: #e0f2fe;">[[微浸润腺癌]] (MIA)</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1; background-color: #e0f2fe; font-weight: bold;">&le; 5 mm</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1; background-color: #e0f2fe; color: #16a34a;">~ 100%</td><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">[[浸润性腺癌]] (IAC)</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">> 5 mm</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">取决于亚型 (40% - 90%)</td><br />
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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;">治疗策略：少即是多</h2><br />
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<h3 style="margin-top: 0; color: #1e40af; font-size: 1.1em;">JCOG0804 研究的启示</h3><br />
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对于影像学上以磨玻璃为主（CTR &le; 0.25）且直径 &le; 2cm 的肺癌（临床上极大概率为 AIS 或 MIA），日本 JCOG0804 临床试验表明：<strong>[[亚肺叶切除]]</strong>（甚至仅做宽楔形切除）的疗效等同于肺叶切除，且并未发现切缘复发。这确立了 MIA "缩小手术"的地位。<br />
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<li style="margin-bottom: 12px;"><strong>手术方式：</strong> 首选 <strong>[[胸腔镜楔形切除]]</strong> 或 <strong>[[肺段切除]]</strong>。无需常规清扫纵隔淋巴结（或仅做采样），因为 MIA 的淋巴结转移概率几乎为零。</li><br />
<li style="margin-bottom: 12px;"><strong>术后管理：</strong> 术后通常<strong>不需要</strong>辅助化疗或靶向治疗。定期复查 CT 即可。</li><br />
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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><br />
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[1] <strong>Travis WD, et al. (2011).</strong> <em>International association for the study of lung cancer/american thoracic society/european respiratory society international multidisciplinary classification of lung adenocarcinoma.</em> <strong>[[Journal of Thoracic Oncology]]</strong>. <br><br />
<span style="color: #475569;">[点评]：奠基性文献，首次正式提出了“微浸润腺癌 (MIA)”这一概念，将其从原来的 BAC（细支气管肺泡癌）分类中独立出来。</span><br />
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[2] <strong>Suzuki K, et al. (2019).</strong> <em>Sublobar resection for peripheral ground glass opacity dominant lung cancer (JCOG0804): Long-term follow-up of a multicenter open-label single-arm study.</em> <strong>[[Journal of Thoracic Oncology]]</strong>. <br><br />
<span style="color: #475569;">[点评]：证实了对于影像学符合 MIA 特征（GGO为主）的肿瘤，楔形切除是足够且安全的，术后 5 年无复发生存率高达 99.7%。</span><br />
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[3] <strong>WHO Classification of Tumours Board. (2021).</strong> <em>Thoracic Tumours (5th Edition).</em> <strong>WHO Press</strong>. <br><br />
<span style="color: #475569;">[点评]：权威病理指南，进一步细化了 MIA 的测量标准，强调排除任何高级别生长模式（如实性、微乳头）。</span><br />
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MIA · 知识图谱<br />
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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;">前驱病变</td><br />
<td style="padding: 10px 15px; color: #334155;">[[非典型腺瘤样增生]] (AAH) • [[原位腺癌]] (AIS)</td><br />
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<td style="padding: 10px 15px; color: #334155;">[[mGGN]] • [[实性成分]]<5mm • [[CTR值]]<0.5 • [[胸膜牵拉]]</td><br />
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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;">鉴别诊断</td><br />
<td style="padding: 10px 15px; color: #334155;">[[浸润性腺癌]] (IAC) • [[微乳头型]] • [[STAS]]</td><br />
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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;">手术方案</td><br />
<td style="padding: 10px 15px; color: #334155;">[[楔形切除]] • [[肺段切除]] • [[JCOG0804]]</td><br />
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