Surgeons have discovered extraordinary new techniques to alleviate the need for operations like heart transplants. But as our medical editor Lawrence McGinty reports, donors are still desperately needed:
The hospital said Mr Cahill lost the use of his right hand due to severe gout. Leeds Teaching Hospitals announced in late 2011 that it was looking for potential candidates for hand or arm transplants. The team had been preparing and assessing potential recipients from across the country.
Potential patients went through health checks and psychological assessment before being considered for the procedure. Mr Cahill was part of the programme and was one of two potential candidates when a donated limb became available. He was selected because he was the best tissue match.
The first person in the UK to have a hand transplant endured a complex, eight hour-long procedure when a donor limb became available.
A new technique meant Mark Cahill, 51, of West Yorkshire, could have his non-functioning right hand removed in operation where a donor hand was also transplanted.
The surgical team had been on standby from the end of November awaiting a suitable donor limb, and the call came just after Christmas.
The professor said it was "still early days" but indications were good and the patient was making good progress.