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肺鳞状细胞癌 - 版本历史
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<p><b>新页面</b></p><div><div style="padding: 0 4%; line-height: 1.8; color: #1e293b; font-family: 'Helvetica Neue', Helvetica, 'PingFang SC', Arial, sans-serif; background-color: #ffffff; max-width: 1200px; margin: auto;"><br />
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<strong>肺鳞状细胞癌</strong>（Lung Squamous Cell Carcinoma, <strong>LUSC</strong>）是<strong>[[非小细胞肺癌]]</strong>（NSCLC）的主要亚型之一，约占肺癌总数的 25% - 30%。<br />
<br>它主要起源于近端支气管的鳞状上皮化生，具有显著的<strong>中央型</strong>分布特征（肺门肿块）。与肺腺癌相比，鳞癌与<strong>吸烟</strong>的相关性最强（>90% 患者有吸烟史），且更易发生中心性坏死形成<strong>[[空洞]]</strong>。<br />
<br>在分子病理层面，鳞癌通常缺乏 EGFR、ALK 等靶向突变，但常伴有 <strong>[[FGFR1]]</strong> 扩增或 <strong>TP53</strong> 突变。免疫组化标记物 <strong>[[p40]]</strong> 和 <strong>[[p63]]</strong> 阳性是其确诊的金标准。<br />
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<div style="font-size: 1.2em; font-weight: bold; letter-spacing: 1.2px;">LUSC</div><br />
<div style="font-size: 0.7em; opacity: 0.85; margin-top: 4px; white-space: nowrap;">Lung Squamous Cell Carcinoma (点击展开)</div><br />
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<div style="font-size: 0.8em; color: #64748b; margin-top: 12px; font-weight: 600;">吸烟者的“中心型”梦魇</div><br />
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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;">病理特征</th><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0; width: 40%;">起源</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">段/亚段支气管上皮</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">典型形态</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">角化珠, 细胞间桥</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">IHC 阳性</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #1e40af;">[[p40]], [[p63]], [[CK5/6]]</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">IHC 阴性</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #e11d48;">[[TTF-1]], [[Napsin A]]</td><br />
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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;">临床表现</th><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">常见症状</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">刺激性干咳, [[咯血]]</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">影像学</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">肺门肿块, 厚壁空洞</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">并发症</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #1e40af;">[[高钙血症]], 阻塞性肺炎</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569;">驱动基因</th><br />
<td style="padding: 6px 12px; color: #e11d48;">罕见 (主要为 TP53)</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;">"鳞" 与 "腺" 的对决：NSCLC 亚型鉴别</h2><br />
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虽然同属非小细胞肺癌，但鳞癌（LUSC）和腺癌（LUAD）在生物学行为、基因特征及治疗方案上存在天壤之别。<br />
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<th style="padding: 12px; border: 1px solid #cbd5e1; color: #0f172a; width: 20%;">维度</th><br />
<th style="padding: 12px; border: 1px solid #cbd5e1; color: #1e40af; width: 40%;">肺鳞癌 (Squamous)</th><br />
<th style="padding: 12px; border: 1px solid #cbd5e1; color: #475569; width: 40%;">肺腺癌 (Adenocarcinoma)</th><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">解剖位置</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>中央型</strong> (段支气管以上)<br>易导致肺不张</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>周围型</strong> (外周肺组织)<br>易累及胸膜</td><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">免疫组化 (IHC)</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>p40 (+)</strong>, CK5/6 (+)<br>TTF-1 (-)</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>TTF-1 (+)</strong>, Napsin A (+)<br>p40 (-)</td><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">靶向治疗</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>机会少</strong><br>EGFR 突变率 < 5%</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>黄金赛道</strong><br>EGFR/ALK/ROS1 突变率高</td><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">化疗禁忌</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>培美曲塞无效</strong><br>首选吉西他滨/紫杉醇</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>培美曲塞</strong>是首选药物</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;">独特的“中央型”并发症</h2><br />
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由于肿瘤常位于大支气管，鳞癌的临床症状往往比腺癌出现得更早、更剧烈。<br />
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<li style="margin-bottom: 12px;"><strong>咯血 (Hemoptysis)：</strong> 肿瘤直接侵犯支气管粘膜血管，早期常表现为痰中带血，晚期可能出现大咯血。</li><br />
<li style="margin-bottom: 12px;"><strong>阻塞性肺炎/肺不张：</strong> 肿瘤向管腔内生长（Endobronchial growth）堵塞气道，导致远端肺组织塌陷或感染，引起发热和呼吸困难。</li><br />
<li style="margin-bottom: 0;"><strong>高钙血症 (Hypercalcemia)：</strong> 鳞癌细胞常异位分泌甲状旁腺激素相关蛋白（<strong>PTHrP</strong>），导致溶骨性破坏和血钙升高，患者可出现嗜睡、多尿、呕吐。</li><br />
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<span style="color: #0f172a; font-weight: bold; font-size: 1.05em; display: inline-block; margin-bottom: 15px;">关键相关概念 [Key Concepts]</span><br />
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<strong>1. p40 / p63：</strong> 诊断鳞癌的免疫组化“双子星”。其中 <strong>p40</strong> 针对 ΔNp63 亚型，其特异性优于 p63（p63 偶尔在部分腺癌中也会弱阳性）。因此，p40 是目前鉴别低分化鳞癌最可靠的指标。<br />
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<strong>2. Cavitation (空洞形成)：</strong> 由于鳞癌生长迅速，肿瘤中心血供不足发生缺血性坏死，坏死物经支气管排出后形成空洞。影像学上表现为厚壁、内壁凹凸不平的偏心空洞。<br />
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<strong>3. Pancoast Tumor (肺上沟瘤)：</strong> 位于肺尖部的肿瘤（绝大多数为鳞癌）。易压迫颈交感神经节引起 <strong>Horner 综合征</strong>（眼睑下垂、瞳孔缩小、眼球内陷、面部无汗），并侵犯臂丛神经引起剧烈肩痛。<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>The Cancer Genome Atlas (TCGA) Research Network. (2012).</strong> <em>Comprehensive genomic characterization of squamous cell lung cancers.</em> <strong>[[Nature]]</strong>. <br><br />
<span style="color: #475569;">[点评]：基因组学里程碑。揭示了肺鳞癌复杂的基因组图谱，主要表现为体细胞拷贝数变异（如 FGFR1 扩增）和 TP53 的普遍突变，而非 EGFR/ALK。</span><br />
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[2] <strong>Scagliotti GV, et al. (2008).</strong> <em>Phase III study comparing cisplatin plus gemcitabine with cisplatin plus pemetrexed in chemotherapy-naive patients with advanced non-small-cell lung cancer.</em> <strong>[[J Clin Oncol]]</strong>. <br><br />
<span style="color: #475569;">[点评]：改变临床实践的研究。首次发现培美曲塞在鳞癌中疗效显著劣于腺癌，确立了鳞癌化疗方案中“去培美”的原则。</span><br />
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[3] <strong>Paz-Ares L, et al. (2018).</strong> <em>Pembrolizumab plus Chemotherapy for Squamous Non-Small-Cell Lung Cancer.</em> <strong>[[N Engl J Med]]</strong>. <br><br />
<span style="color: #475569;">[点评]：KEYNOTE-407 研究。确立了“帕博利珠单抗 + 紫杉醇/卡铂”作为晚期肺鳞癌一线治疗的金标准，显著延长了生存期。</span><br />
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肺癌诊疗 · 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;">上级分类</td><br />
<td style="padding: 10px 15px; color: #334155;">[[非小细胞肺癌]] • 上皮源性肿瘤</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;">核心标志物</td><br />
<td style="padding: 10px 15px; color: #334155;">[[CYFRA 21-1]] (血清) • [[p40]] (病理) • [[SCC-Ag]]</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;">一线药物</td><br />
<td style="padding: 10px 15px; color: #334155;">[[帕博利珠单抗]] • [[紫杉醇]] • [[吉西他滨]]</td><br />
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120.244.141.225