This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Liver, Subject name: Surgery
Solitary hypoechoic lesion of the liver without septa or debris is most likely to be:- 
Select and explain. 
A. Hydatid cyst, B. Caroli's disease, C. Liver abscess, D. Simple cyst
D: Simple cyst
Answer: D: Simple cyst 
Explanation: Simple hepatic cyst Contain serous fluid, do not communicate with the biliary tree, and do not have septations. Single in 50% cases. Treatment Nonsurgical treatment: Aspiration and injection of a sclerosing agent (most frequently ethanol) Complication MC complication: Intracystic bleeding