Can I get implant removal followed by fat transfer? I am 28 years old and got my implants when I was 17.

Unfortunately, you have not provided photographs but it is possible to remove your implants with a simultaneous lift.  The technique I recommend is explantation using The Bellesoma Method.  Your implants are removed, your breast tissue is reshaped creating upper pole fullness, elevated higher on the chest wall and more medial to increase your cleavage.  Vertical scars are avoided, nipple sensation and the ability to breast feed, if not injured during your previous surgery.  At the same time or later, fat transfers can be performed if additional volume is desired.Best Wishes,Gary Horndeski, M.D.

Fat transfer is an alternative option to breast implants *if* you have enough fat for donor source. To replace a single  300 cc implant, you would likely need to harvest almost twice that volume in fat since not all of the liposuction aspirate is good enough to use for fat transfer (the liquidy part is discarded, and only the "fluffy, good fat" can be used. To replace both sides you would need over a liter of liposuction aspirate. If you are only 120 pounds and 5'9", most likely you do have enough fat to maintain the size you currently have, but you may be a candidate for something smaller. I recommend seeing a (board certified) plastic surgeon in consultation to determine if you are a candidate. (The only reason I am attaching a link to my breast lift category is to show what a very small volume of fat transfer can do. Please see the 4th row (4th patient) down from the top, for an example.)

 Yes, this is very possible.  I this is my usual approach. I recommend an in-office examination as well as a detailed discussion with a surgeon who you are comfortable with.   Finally, make sure your surgeon is a Double-Board Certified Plastic Surgeon certified by the American Board of Plastic Surgery (ABPS), a member of the American Society of Plastic Surgery (ASPS), a member of the American Society of Aesthetic Plastic Surgery (ASAPS), and a fellow of the American College of Surgeons (FACS).Best,Dr. DesaiBeverly Hills Institute for Aesthetic Plastic SurgeryHarvard Educated, Beverly Hills & Miami Beach TrainedDouble Board-Certified, Double Fellowship-Trained Beverly Hills Plastic Surgeon

Dear virtualgirl1989,yes, that is one option. You can get implant removal followed by fat transfer. Fat transfer breast augmentation is a viable alternative for women who desire larger breasts without the use of implants. 
You should discuss your concerns with a board certified plastic surgeon and make sure your surgeon understands your concerns and your goals. Only after a thorough examination you will get more information and recommendations.Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

An examination would need to be performed to determine if you are a candidate for fat removal.  Based on the description you provided, it is unlikely that enough fat would be able to be harvested to make enough of a difference to undergo the procedure.  An examination by a board certified plastic surgeon will help answer your questions.

Your situation is not that uncommon.  Many women who had implants when they were younger decide years later that they want o go smaller or just get rid of their implants all together.  In your case, at 5’9 and 120 pounds it is unlikely that you will have enough fat to get a reasonable result with fat grafting. In addition, it often takes two surgical sessions to achieve a noticeable or reasonable result.  You might consider a small natural feeling gummy bear implant as many women love these after having a saline implant. 

I have added a web reference to an article on a “mini boob job” that  you might find helpful.

I hope that helps.

Best regards