Presentation
Routine screening.
Patient Data
Age: 55 years
Gender: Female
From the case:
Infiltrating ductal carcinoma
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Info

No focal abnormality, mass lesion or architectural distortion. Note the profile of the pectoral muscle.
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There is a subtle density in the submammary fat overlying the muscle profile.
From the case:
Infiltrating ductal carcinoma
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Info

The ultrasound images show the typical appearance of an infiltrating ductal carcinoma deep to the breast on the pectoral fascia.
Case Discussion
The submammary fat is a review area in mammography. Train your eye to routinely review the profile of the pectoral muscle and you will not miss these lesions.