Is it possible to remove my large implant, remove excess skin and place a smaller implant to have higher sitting breasts?

This is all possible with a board certified plastic surgeon who has the credentials needed to determine if a breast implant pocket adjustment may be required as well as a breast lift. Having lost 50 pounds prior to having your beast lift and implants placed, you may want to consider other procedures to have the rest of your anatomy match your smaller size implants.

Thank you for sharing your question.  It may be possible to pursue your desired treatment but this would depend on your current breast appearance, and key breast measurements.  Seek out a series of consultations to get the best treatment advice. 

Yes, you large heavy implants ca be removed and replaced with smaller implants. The pockets can be tightened internally and lifted if needed. Your surgeon will need to examine you to see if a lift can be done at the same time to raise the sagging nipples and remove excess skin.  Sometimes, it has to be done in stages to preserve the blood flow to the nipples.