Prosthetic Limb Replacement

We are raising funds to help our sister, Maame Kobeawah Osam-Dade (HOPSA 2014), who was diagnosed of osteogenic sarcoma (bone cancer), underwent a limb salvage surgery to save her leg but due to financial constraints could not replace the prosthesis in her leg resulting in her upper knee amputation.
An amount of $25,000 is needed to perform surgery to replace the endoprosthesis and get a prosthetic limb to enable her walk again.
Please help us support a sister. Any amount would be very much appreciate.