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: Pathology
40-year-old female, chronic smoker, presented to the surgical depament with a reddish, painful subareolar mass in the right breast. She is most likely suffering from? 
Select and explain. 
A. Carcinoma breast, B. Periductal mastitis, C. Fat necrosis, D. Granulomatous mastitis
B: Periductal mastitis
Answer: B: Periductal mastitis 
Explanation: She is most likely suffering from Periductal mastitis. Aka Zuska's disease /Recurrent subareolar abscess/Squamous metaplasia of lactiferous ducts Smoking has been implicated as a risk factor. Smokers - relative Vit A deficiency - Squamous metaplasia - Obstruction - Dilation of duct Features: Subaerolar mass Pain and redness Nipple retraction Fistula formation May mimic malignancy