My radiologist diagnosed me with cholelithiasis, but my gall bladder was removed 4 years ago? How can it be?

The gall bladder is just a storage device for bile. If it is removed, the bile flows directly into your duodenum. Bile is continuously excreted from your liver and flows through a number of ducts. These ducts can become affected by inflammation or very small gall stones can be formed and block the flow of bile in that duct. Therefore, these stones will show during examination by x-rays. Normally this can be remedied by a special diet and some specific medication without the need for another surgical procedure. However, you should discuss this with your physician/radiologist.