ANSWER:
A needle biopsy procedure would be very useful on the lunos under the breast. 
Step-by-step explanation:  
- This procedure of the breast involves taking sample of cells from the breast tissue. 
 
- In this technique, the doctor or nurse uses a hollow needle to take the sample from the suspects. 
 
- The samples can then be examined under a microscope. 
 
- This test can predict the presence of cancer or any other condition of the breast like the ductal carcinoma in lab conditions.