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: Surgery
Follwing are true of Paget's disease of breast except? 
Select and explain. 
A. Usually bilateral, B. Associated intraductual carcinoma, C. Prognosis good in absence of lump, D. Treatment simple mastectomy with axillary clearance
A: Usually bilateral
Answer: A: Usually bilateral 
Explanation: Ans. is 'a' i.e. Usually bilateral