Table 1.
Background characteristics of patients by reason for unresectability
| Factor | UR (n = 66) | LA (n = 42) | M (n = 24) | P value | |
|---|---|---|---|---|---|
| Gender | Male/female | 34/32 | 20/22 | 14/10 | 0.4021 |
| Age | Years, median (range) | 67 (45‐83) | 67 (45‐83) | 67 (46‐83) | 0.9415 |
| Main tumor location | Head/body‐tail | 41/25 | 28/14 | 13/11 | 0.3139 |
| Tumor diameter | mm, median (range) | 30 (7‐75) | 30 (15‐51) | 31 (7‐75) | 0.9415 |
| Clinical TNM stagea | |||||
| cT | ≤3/4 | 52/14 | 32/10 | 20/4 | 0.7115 |
| CH‐DU‐S‐RP | 0/1 | 4/62 | 1/41 | 3/21 | 0.0974 |
| PV | 0/1 | 22/44 | 11/31 | 11/13 | 0.1034 |
| PL | 0/1 | 14/52 | 4/38 | 10/14 | 0.0041 |
| A | 0/1 | 40/26 | 24/18 | 16/8 | 0.4462 |
| cN | 0/1/M1(LYM) | 53/10/3 | 35/6/1 | 18/4/2 | 0.5547 |
| cM | HEP/PER/PUL/OSS | 13/10/1/1 | 13b/10b/1/1 | ||
| Histological confirmation | Adenocarcinoma/no | 62/4 | 41/1 | 21/3 | 0.0974 |
| Biliary drainage | Yes/no | 35/31 | 21/21 | 14/10 | 0.5141 |
Abbreviation: A, arterial system invasion; CH, bile duct invasion; DU, duodenal invasion; HEP, hepatic metastasis; LA, locally advanced; LYM, lymph node metastasis; M, metastatic; OSS, osseous metastasis; PER, peritoneal metastasis; PL, extrapancreatic nerve plexus invasion; PUL, pulmonary metastasis; PV, portal venous system invasion; RP, retropancreatic tissue invasion; S, invasion of the serosal side of the anterior pancreatic tissue; UR, unresectable.
a
Japan Pancreas Society, General rules for the study of pancreatic cancer, seventh edition.
b
HEP + PER (n = 1).