Presentation
Routine screening mammograms of a teacher.
Patient Data
Age: 50 years
Gender: Female
From the case:
Developing carcinoma left breast

Ultrasound guided core biopsy (needle in situ) confirms an infiltrating ductal carcinoma left breast.
Case Discussion
This case illustrates the value of using the old study for careful comparison with the most recent. No one should reasonably be reading any breast imaging without comparing with previous.
It's important to recognize how difficult it would be to spot the lesion on the 2011 study.