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 incidental finding on ultrasound abdomen is suggestive of: 
Select and explain. 
A. Gall bladder stone, B. Gall bladder polyp, C. Adenomyomatosis, D. Xanthgranulomatous cholecystitis
C: Adenomyomatosis
Answer: C: Adenomyomatosis 
Explanation: Adenomyomatosis: Image shows: Diamond ring sign / comet tail aefact / V - shaped aefact Hyperplasia in muscularis & hyperproliferation of mucosa in gall bladder. Rokitansky-Aschoff sinuses are deep and there is deposition of Cholesterol crystal, when ultrasound is performed it looks like a ring. Rx: Symptomatic gall stone present - Lap. Cholecystectomy