This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gallbladder, Subject name: Surgery
This procedure is performed in which of the following conditions? 
Select and explain. 
A. Mucocele, B. Mirizzi's syndrome, C. Xanthogranulomatous cholecystitis, D. Acalculous cholecystitis
D: Acalculous cholecystitis
Answer: D: Acalculous cholecystitis 
Explanation: The procedure is percutaneous cholecystostomy . The procedure is performed in acalculous cholecystitis Acalculous cholecystitis. Inflammation of GB in absence of stones. TOC: lap. cholecystectomy if patient is unstable - percutaneous cholecystostomy.