Table 2 Recurrence disease of NB during maintenance treatment
Time point of recurrence | Total cases (n = 36) |
|---|---|
with 13-cis-retinoic acid | 31 |
the first-three months | 5 |
next 6–9 months | 26 |
after 13-cis-retinoic acid stopped | 5 |
3–6 months | 2 |
6–12 months | 2 |
Over 12 months | 1 |