Common complications of cholelithiasis include gallbladder inflammation, cholangitis, and acute pancreatitis. On the other hand, rare complications include gallbladder carcinoma, gallstone ileus, Mirizzi syndrome and gallbladder perforation. Some patients with cholecystitis do not require hospitalization. It is of key importance for proper further diagnosis and treatment to remember about the possible complications of cholecystitis, especially in oligosymptomatic patients. Therefore, ultrasound examinations in patients with a history of gallbladder stones should be performed with appropriate care. Ultrasound should be performed carefully in patients with a history of cholecystolithiasis, especially those oligosymptomatic, bearing in mind that there are some rare complications of this highly common clinical entity.