"The estimated prevalence is around 3%–5% of patients with cholelithiasis, and it is more common in elderly females 3."
"collapsed gallbladder with thick wall and intraluminal air. Pneumobilia can be seen if air extends to bile ducts."
"gallstone disease: secondary to chronic cholecystitis, stones can form and migrate through fistulous tract with GIT"
"Patients can be asymptomatic or have variable non-specific symptoms like upper abdominal pain, diarrhoea, nausea or weight loss ref."
"History and etymology"