Intraductal papillomas are benign tumors that form in the milk ducts behind the nipple. It is most common in middle-aged women. It can cause nipple discharge. The discharge can be very different (it can be yellow, dark green or brown, or it can be cloudy or bloody). If necessary, it is surgically removed together with the milk duct in which it is located.

It is the most common cause of bloody nipple discharge behind the nipple and is found in the 30-50 age group. It is usually seen as 3-4 mm tumors smaller than 1 cm in size in the milk duct. Papillomas on the outer parts of the breast are seen in younger patients, less often with nipple discharge. Multiple intraductal papillomas that occur further outside the breast increase the risk of concomitant or subsequent cancer in both breasts compared to single intraductal papillomas that occur in the nipple.