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
[{'content': '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? \nSelect and explain. \nA. Carcinoma breast, B. Periductal mastitis, C. Fat necrosis, D. Granulomatous mastitis', 'role': 'user'}, {'content': "Answer: B \nExplanation: 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", 'role': 'assistant'}]