Survival
A summary of survival data is presented in table 2. 3-year OS was reported on patients undergoing ND only in five studies (n=89) and ranged from 43.9% to 100%. 3-year DFS was available in four studies (n=62) for the same and ranged from 42.8-67.0%. 5-year OS and DFS was available in three studies (n=31) and ranged from 36.6-75.0% and 43.6-67.0% respectively.