Table 2 Radiation dosimetry stratified by standard vs. Oncoplastic lumpectomy
Variable | Standard n = 27 | Oncoplastic n = 25 | P value |
|---|---|---|---|
PTV30 volume cc, median (IQR) | 140.9 (112.2 to 200.9) | 160.7 (121.5 to 201.3) | 0.79 |
PTV26 to 28.5Â cc, median (IQR) | 223.3 (173.1 to 355.4) | 266.1 (201.9 to 330.7) | 0.78 |
Ipsilateral breast volume cc, median (IQR) | 917.7 (760.4 to 1217.1) | 1064.9 (940.9 to 1345.4) | 0.93 |
Ratio of PTV to whole breast % median (IQR) | 25.1% (16.4 to 30.7%) | 24.6% (16.2 to 27.9%) | 0.70 |
Heart mean dose Gy, median (IQR) | 0.30 (0.17 to 0.45) | 0.39 (0.15 to 0.66) | 0.07 |
Heart V3 Gy, median (IQR) | 0.0% (0.0 to 0.50%) | 2.2% (0.0 to 3.7%) | 0.01 |
Contralateral breast Dmax Gy, median (IQR) | 1.24 (0.23 to 3.27) | 2.12 (0.48 to 3.83) | 0.71 |
Ipslilateral lung mean cc, median (IQR) | 2.5 (1.2 to 3.4) | 3.0 (2.0 to 3.6) | 0.12 |
Contralateral lung mean cc, median (IQR) | 0.05 (0.02 to 0.10) | 0.06 (0.03 to 0.09) | 0.35 |
Radiation technique, IMRT fields median (IQR) | 5 (5 to 6) | 5 (5 to 6) | 0.71 |
VMAT partial arcs | 2 (7%) | 0 (0%) | Â |