How big a gallbladder polyp can become cancerous cannot be determined, it depends on the specific situation, in general if the polyp is more than 1cm, the probability of cancer will be significantly higher. In addition, it depends on the type of polyp, for cholesterol polyps, inflammatory polyps, usually the probability of cancer is extremely low. For adenomatous polyps, the probability of cancer is relatively high, especially when the adenomatous polyp is more than 1cm, it should be treated as early as possible. Therefore, it depends on the type of biliary polyp.

In addition, it is also necessary to make a comprehensive judgment based on the current growth rate of the biliary polyp, its size, whether it is single or multiple, whether it has a wide or narrow tip, whether it is regular in shape, and whether it is combined with severe cholecystitis, etc. Pure size can only be used as a single assessment factor. At present, the clinical consideration is mainly to 1cm as the boundary, because the probability of malignant transformation of biliary polyps above 1cm is correspondingly higher

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