This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Surgery
A 35-year-old patient presents to your office with chronic draining subcutaneous periareolar abscesses, which have been incised and drained many times in the past 5 years but keep recurring. What is the best treatment of choice? 
Select and explain. 
A. Repeat incision and drainage (I and D) since the previous procedures were inadequate, B. Long-term antibiotics, C. Major duct excision, D. Complete excision of the drainage tract
D: Complete excision of the drainage tract
Answer: D: Complete excision of the drainage tract 
Explanation: Mammary fistula also known as Zuska's disease is felt to represent dilated laciferous ducts, which develop chronic inflammation presenting with these periareolar draining sinuses. They will continue to recur until completely excised, which may require removal of the terminal duct into the nipple, leaving the wound open.