牛牽到北京還是牛：肺癌轉移到肝臟仍然是肺癌，原發與轉移癌的解析 Understanding Primary and Metastatic Cancer

這段影片將以「牛牽到北京還是牛」的比喻來解釋癌症轉移的原理。當肺癌轉移到肝臟，仍然被稱為肺癌，這是因為轉移的癌細胞來自原發腫瘤，而非新的癌症。影片將深入探討什麼是原發癌和轉移癌，並解釋為什麼癌症轉移後，治療仍然針對原發腫瘤的癌細胞，而不是轉移部位的器官。觀眾將學習到如何區分原發癌與轉移癌，並更好地理解癌症診斷和治療。 This video will use the analogy "a cow in Beijing is still a cow" to explain the concept of cancer metastasis. When lung cancer spreads to the liver, it is still referred to as lung cancer because the metastatic cells originate from the primary tumor, not a new cancer. The video will explore the difference between primary and metastatic cancer and explain why treatment targets the cancer cells from the primary tumor, regardless of where it has spread. Viewers will gain a clearer understanding of how to differentiate between primary and metastatic cancers and better understand the diagnosis and treatment process.