Can the mammography test discover the breast cancer even if the woman had a breast enlargement surgery (silicon)?

See below: It can still be used but it's predictability can be compromised, depending on the surgery.

Yes: Mammogram i still the best means to identify early breast cancer. A breast implant can make mammograms more difficult to interpret and likely will require special or additional mammogram views for the radiologist to see what they need to.

Yes: Yearly mammography should be obtained beginning at age 40 whether a woman has implants or not. The standard examination adds two additional images which "push back" the implants so that nearly all of the breast is imaged. I have detected many small breast cancers easily on mammograms which could then be biopsied by a needle without jeopardizing the implant.