Table 5. .
Risk of secondary cancer after NPC
| RT Technique (number of patients) | Second cancer (time of diagnosis since treatment when known) |
|
| Guo,45 | IMRT (95) | 0 % |
| Jouin, 201942 | 3D CRT38 IMRT57 |
3% (6–8 years) |
| Liu, 201427 | 3D CRT (103) IMRT55 |
3.8% (3–11 years) |
| Daoud, 201374 | 2D/3D CRT69 | 2.5 % |
| Casanova, 20123 | 2D/3D CRT30 IMRT18 |
3 % |
| Cheuk, 201112 | 2D/3D CRT52 IMRT6 |
8.5% (8–27 years) |
| Greenwalt, 201675 | IMRT10 | 10% (meningioma) |
CRT, conformational radiotherapy; IMRT, intensity modulated radiation therapy; NPC, nasopharyngeal carcinoma.