大腸癌好多時都係由瘜肉開始，一步一步咁變大變差；由於呢個過程相當緩慢，我哋可以透過各種各樣嘅方法，喺變成癌症之前，檢查出大腸裏面嘅病變，而其中一個最普遍嘅方法就係做大便隱血測試。
Colorectal cancer often starts with a polyp and gets bigger and worse step by step, and since this process is quite slow, we can use a variety of methods to detect lesions in the large intestine before it becomes cancer, and one of the most common methods is to do a fecal occult blood test.