Table 2.
Association of high PD-L1 expression with the clinicopathological characteristics of 91 patients with retroperitoneal liposarcoma
| Characteristics | Total | High PD-L1 expression (%) | Low PD-L1 expression (%) | P value |
|---|---|---|---|---|
| Gender | ||||
| Male | 52 | 4(7.7) | 48(92.3) | >0.999 |
| Female | 39 | 3(7.7) | 36(92.3) | |
| Age | ||||
| ≤60 | 55 | 4(7.3) | 51(92.7) | >0.999 |
| >60 | 36 | 3(8.3) | 33(91.7) | |
| Tumor size | ||||
| ≤15 | 16 | 2(12.5) | 14(87.5) | 0.051 |
| 15-30 | 50 | 1(2.0) | 49(98.0) | |
| >30 | 25 | 4(16.0) | 21(84.0) | |
| FNCLCC Grade | ||||
| Low (G1) | 20 | 3(15.0) | 17(85.0) | 0.361 |
| High (G2, G3) | 71 | 4(5.6) | 67(94.4) | |
| Histology | ||||
| DDLPS | 61 | 5(8.2) | 56(91.8) | 0.270 |
| WDLPS | 21 | 1(4.8) | 20(95.2) | |
| PLPS | 7 | 0(0) | 7(100) | |
| MLPS | 2 | 1(50.0) | 1(50.0) | |
| Multifocality | ||||
| No | 54 | 3(5.5) | 51(94.4) | 0.436 |
| Yes | 37 | 4(10.8) | 33(89.2) | |
| Recurrence | ||||
| No | 38 | 1(2.1) | 47(97.9) | 0.049 |
| Yes | 43 | 6(14.0) | 37(86.0) | |
| Necrosis | ||||
| No | 60 | 5(8.3) | 55(91.7) | >0.999 |
| Yes | 31 | 2(6.5) | 29(93.5) |
Abbreviations: SD, standard deviation; FNCLCC, Federation Nationale des Centres de Lutte Contre le Cancer; PD-L1, programmed death ligand 1; WDLPS, well-differentiated liposarcoma; DDLPS, dedifferentiated liposarcoma; PLPS, pleomorphic liposarcoma; MLPS, myxoid/round cell liposarcoma.