This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Orthopaedics
Extended currettage is must in all conditions except: 
Select and explain. 
A. Aneurysmal bone cyst, B. Unicameral bone cyst, C. Enchondroma, D. Giant cell tumor
B: Unicameral bone cyst
Answer: B: Unicameral bone cyst 
Explanation: None