A 60 year old man presents with pain in his left breast for 3 weeks. He is otherwise asymptomatic. His medical and surgical histories are only significant for a right-sided inguinal herniotomy at the age of 55, which was without complications. His family history is unremarkable. He only drinks socially, and has never smoked.
The ultrasound scan reveals a 2.0 x 1.1 cm hypoechoic irregular mass in the left breast, with posterior acoustic shadowing. The left axilla appears normal, as does the right breast and axilla.
The fine needle aspiration report comes as C4 (suspicious of malignancy).
You realize that an incision biopsy is not indicated here.
CA 15-3, CA-27.29, and carcinoembryonic antigen (CEA) levels are all within the reference ranges.