Recurrence rate according to treatment group. There was no significant difference in local recurrence rate between S(IL) and RT/Cryo + S (IL) (P = 0.873 > 0.05, χ2 = 0.026) or RT and S(IL) (P = 0.336 > 0.0125, χ2 = 0.926). There was a significant difference in local recurrence rate between RT andS(W) (P = 0.000 < 0.0125, χ2 = 21.992) and S(IL) and S(W) (P = 0.000 < 0.0125, χ2 = 18.144). The recurrence rate was lower after S(W) than after the other three treatments, whereas the recurrence rate was similar for RT, S(IL) and RT/Cryo + S (IL).