Table 1.
Selected clinical characteristics of the study population.
| Parameter | Count (Percent) |
|---|---|
| Age (years) | |
| Median (range) | 63 (35-80) |
| Gender | |
| Male | 23 (59%) |
| Female | 16 (41%) |
| Race | |
| Caucasian | 37 (95%) |
| Other | 2 (5%) |
| ECOG performance status | |
| 0 | 13 (33%) |
| 1 | 21 (54%) |
| 2 | 5 (13%) |
| Tumor size (cm) | |
| Median (range) | 3.1 (0.6-6.5) |
| Initial resectability status | |
| Borderline resectable | 22 (56%) |
| 1) Contact with SMV/PV > 180° | 6 |
| 2) Contact with SMV/PV <180° with irregularity or thrombosis of vein(s) | 4 |
| 3) Contact with IVC | 1 |
| 4) Contact with SMA or CA ≤ 180° | 4 |
| 5) Contact with CHA/variant arterial anatomy | 7 |
| Unresectable | 17 (44%) |
| 1)Contact with SMA > 180° | 11 |
| 2)Contact with CA >180° | 6 |
| Clinical T classification | |
| T3 (extending beyond pancreas but not involving SMA/CA) | 18 (54%) |
| T4 (involving SMA or CA) | 21 (46%) |
| Clinical N classification | |
| N0 | 22 (56%) |
| N1 | 17 (44%) |
| PTV size (mm3) | |
| Median (range) | 125 (37-278) |
Abbreviations: ECOG, Eastern Cooperative Oncology Group; SMV, superior mesenteric vein; PV, portal vein; IVC, inferior vena cava; SMA, superior mesenteric artery; CA, celiac artery; CHA, common hepatic artery; PTV, planning target volume