👨‍⚕️ Dr. BOSS 的一般外科衛教室｜Episode 03：胃癌 vs 胃腸道基質瘤差在哪？

👨‍⚕️ Dr. BOSS 的一般外科衛教室｜Episode 03：胃癌 vs 胃腸道基質瘤差在哪？ Dr. BOSS’s General Surgery Health Classroom｜Episode 03: Gastric Cancer vs GIST – What’s the Difference? 副標 / Subtitle 👨‍⚕️ Dr. BOSS × 🐨 Koala | 同樣是胃腫瘤，其實完全不同！ 👨‍⚕️ Dr. BOSS × 🐨 Koala | Same Location, Totally Different Tumors --- 🟦 對話稿 Dialogue（中英對照） Koala： BOSS醫生，胃癌跟GIST不都是長在胃裡嗎？ Doctor BOSS, both gastric cancer and GIST grow in the stomach, right? BOSS 醫生： 沒錯，但它們的來源完全不同，就像蘋果跟橘子一樣。 Yes, but they have completely different origins—like apples and oranges. Koala： 那為什麼會這麼不一樣？ Why are they so different? BOSS 醫生： 因為一個來自黏膜，一個來自間質，這會影響整個治療方向。 Because one comes from the mucosa and the other from stromal tissue—this changes everything about treatment. --- 🟦 結構篇 Structure（中英對照） BOSS 醫生： 胃癌與GIST的核心差異： Key differences between gastric cancer and GIST: 1. 來源 Origin 胃癌：胃黏膜 Gastric cancer: mucosa GIST：間質細胞 GIST: stromal cells --- 2. 生長方式 Growth pattern 胃癌：向內擴散 Spreads inward and across lining GIST：向外生長 Grows outward from the wall --- 3. 發現方式 Detection 胃癌：內視鏡容易看到 Easily detected by endoscopy GIST：可能較晚發現 May be harder to detect early --- 🟦 臨床重點 Clinical Insight（中英對照） Koala： 症狀會不一樣嗎？ Do symptoms differ? BOSS 醫生： 早期很像，但後期差異會慢慢出現。 Early symptoms can be similar, but differences appear over time. 👉 胃癌常見： 食慾下降 Loss of appetite 體重減輕 Weight loss 持續胃痛 Persistent pain 👉 GIST常見： 無症狀（早期） Often asymptomatic 腫塊感 Mass effect 出血 Bleeding --- 🟦 外科觀點 Surgical Perspective（中英對照） BOSS 醫生： 治療差異是最大重點： Treatment differences are crucial: 👉 胃癌 可能需要大範圍切除 + 淋巴結清除 Requires wider resection + lymph node dissection 👉 GIST 局部切除為主 Local resection is often sufficient 👉 藥物 胃癌：化療 Gastric cancer: chemotherapy GIST：標靶治療 GIST: targeted therapy --- 🟦 記憶重點 Key Takeaway（中英對照） BOSS 醫生： 👉 一句話記住： One sentence to remember: 胃癌 = 黏膜腫瘤（常見、擴散型） Gastric cancer = mucosal tumor (common, spreading type) GIST = 間質腫瘤（特殊、外生型） GIST = stromal tumor (distinct, outward-growing) --- 🟦 小知識 Mini Note（中英對照） Koala： 那會不會被誤診？ Can they be misdiagnosed? BOSS 醫生： 有可能，所以需要影像、內視鏡與病理一起判斷。 Yes, which is why imaging, endoscopy, and pathology are all needed. --- 🟦 腫瘤大小與分期 Tumor Size & Staging BOSS 醫生： 胃癌與 GIST 的大小和分期會直接影響治療方式。 Tumor size and staging directly affect treatment for both gastric cancer and GIST. --- 1️⃣ 胃癌 Gastric Cancer 早期 Early stage：腫瘤局限於黏膜或黏膜下層 Early: tumor confined to mucosa or submucosa 進展期 Advanced stage：腫瘤侵入肌肉層或更深，可能轉移淋巴結或遠端器官 Advanced: tumor invades muscular layer or deeper, may spread to lymph nodes or distant organs 大小判斷 Size：一般 2–5 公分是早期可切除範圍 Size: typically 2–5 cm is resectable in early stage 治療影響：早期可內視鏡切除；進展期需手術 + 化療 Treatment impact: early stage—endoscopic resection; advanced—surgery + chemotherapy --- 2️⃣ 胃腸道基質瘤 GIST 小型 Small (<2 cm)：低風險，可觀察或微創切除 Small (<2 cm): low risk, can be observed or minimally resected 中型 Medium (2–5 cm)：手術切除為主，視基因型可能給標靶藥物 Medium (2–5 cm): surgery, may require targeted therapy depending on mutation type 大型 Large (>5 cm) 或高風險 High-risk：手術 + 標靶治療（如 imatinib） Large (>5 cm) or high-risk: surgery + targeted therapy (e.g., imatinib) 分期重點：不像胃癌有傳統 TNM 分期，GIST 評估以大小、位置、核分裂指數（mitotic index）決定風險 Staging: unlike gastric cancer’s TNM system, GIST risk is assessed by size, location, and mitotic index --- 💡 小知識 Mini Note Koala： 大小真的影響治療？ Does size really affect treatment? BOSS 醫生： 完全正確！腫瘤越大或越活躍，手術難度與復發風險都會增加。 Absolutely! Larger or more active tumors increase surgical complexity and recurrence risk.