Can I have breast augmentation if I have scleroderma (CREST syndrome)?

As mentioned by my colleagues, the most important consideration is the medications that you are taking. Specifically, do those medications decrease your ability to fight infection or heal from surgery. There is nothing about your disease that would limit the surgery unless your disease has caused calcification of the skin or decrease skin elasticity. It is rare for CREST to do this, but I have seen cases where the calcifications of the skin created concern for a safe procedure. The choice of implant material doesn't really impact the safety of the procedure for you, both saline and silicone are great options. I would recommend discussing with your rheumatologist and board certified plastic surgeon to best understand your risk. Best of luck!

Is very important to know the medications you are currently taking about your condition. You have to ask your doctor about having this surgery first.

It would be important to know the medications you are currently taking.  You should discuss surgery with the physician who is treating you for CREST syndrome.  Having this disease does not necessarily prevent you from have a breast augmentation and using a saline implant would not be necessary.