“…Our literature search yielded 38 observational studies [ 4 , 5 , 6 , 7 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 ] published between 1949 and 2016, which examined the outcome of cryosurgery in patients with giant cell tumours of the bone. Table 1 shows the detailed features of the included articles.…”