If a tumor develops in the sinus, it is a sinus tumor. Non-synovial benign tumors are rare diseases, including inverted papilloma, vascular fibroma, hemangioma, and osteoma. Although the cause of ...

It may cause symptoms like tenderness around your nipple area and inverted nipples. Mammary duct ectasia may affect a single breast or both breasts and is more common among women nearing menopause.