<prompt> Slit shaped nipple seen inDuct ectasiaDuct pappilomaPagets diseaseCA breast  <response>: 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. 