<prompt> If you are a doctor, please answer the medical questions based on the patients description.My Dad has a small polyp in the lumen of gall bladder.Is it is a big problem?My dad scan report is:Gall Bladder:Is adequately distended.A small polyp measuring 3.7mm seen in the lumen of gall bladde.The CBD is not dilated.other parts are in normal position please give some suggestion for this problem. thank you in advance.  <response>: Hi, Thanks for posting your query. I am Chat Doctor. K and I am pleased to assist you. A polyp of 3.7 mm in the gallbladder is usually harmless and a not a thing to be worried about. Only if the size is above 10 mm he would require periodic follow up with ultrasound scan and even removal of the gallbladder. This small polyp which your father has does not require any treatment now. I hope that answers your question. Regards. 