Gallbladder cancer is a rare type of cancer that begins in the gallbladder, a small organ located beneath the liver. The gallbladder stores bile, a digestive fluid produced by the liver. Symptoms may include abdominal pain, jaundice, and unexplained weight loss, but many people do not experience noticeable symptoms in the early stages. Risk factors for gallbladder cancer include gallstones, obesity, and certain genetic conditions. Diagnosis typically involves imaging tests like ultrasounds or CT scans, and treatment options may include surgery, chemotherapy, or radiation therapy, depending on the cancer's stage and location.