Doctor, there’s a fly in my cyst

This case report has a definite Seth Brundle (aka, Jeff Goldblum) quality — only with a history of diabetes and smoking as opposed to a botched teleportation attempt.
A 62-year-old man presented to a US breast clinic with bilateral retroareolar masses that had been present for seven years, as well as new-onset pink nipple discharge of several months.
He had previously undergone a left breast biopsy for a palpable mass, which the patient reported to have been benign.
His history was significant for type 2 diabetes and a 20 pack-year smoking habit, but he denied any recent trauma, infection or a family history of breast cancer.