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
Slit shaped nipple seen in 
Select and explain. 
A. Duct ectasia, B. Duct pappiloma, C. Paget's disease, D. CA breast
A: Duct ectasia
Answer: A: Duct ectasia 
Explanation: Answer- A. Duct ectasiaDuct ectasia is dilatation of lactiferous ducts associated with periductal inflammation.Chronic inflammation and scarring will lead to indrawing and slit-shaped inversion of the nipple.If secondary infection supervenes, a mammary duct fistula can also develop.