Table 2. Radiotherapy techniques used in each treatment group and incidence of radiation pneumonitis.
| RT technique | IMNI No. (%) | Non-IMNI No. (%) | No. of RP (IMNI/non-IMNI) |
|---|---|---|---|
| MRM (n=356) | |||
| Reverse hockey stick | 51 (29.4) | 50 (27.3) | 10 (7/3) |
| Standard tangent | 0 | 132 (72.1) | 5 (0/5) |
| Partial wide tangent | 84 (48.5) | 0 | 9 (9/0) |
| Photon/electron combination | 38 (21.9) | 1 (0.5) | 2 (2/0) |
| BCS (n=354) | |||
| Standard tangent | 0 | 182 (100.0) | 4 (0/4) |
| Partial wide tangent | 101 (58.7) | 0 | 4 (4/0) |
| Photon/electron combination | 71 (41.2) | 0 | 1 (1/0) |
RT=radiation therapy; IMNI=internal mammary node irradiation; RP= radiation pneumonitis; MRM=modified radical mastectomy; BCS=breastconserving surgery.