Ja'Niya Walker, 40 (left), from Los Angeles, California, was vacationing in Roatán, Honduras, in July 2017 when a puma bit her right index fingertip off (top right). Doctors in Honduras the US told her that she would likely have to accept that she would have an amputated finger for the rest of her life. But Dr Akash Bajaj in California told her that with platelet-rich plasma (PRP) technology, they could stimulate the growth of a fingertip. Platelets contain growth factors, which are stem-cell like proteins that heal injuries. They are separated from blood cells and spun in a centrifuge to create a concentrated solution that is injected into the affected area. Within two days, Walker's finger began returning to its proper color and within two months, her nail was growing back (bottom right). She says she has now regained her confidence.