Table 1.
Patient characteristics and tumor specimen information.
| Total (n = 87) | |
|---|---|
| Age (years), median | 64 (35–86) |
| Male | 54 (62.1) |
| Stage at tissue acquisition | |
| Non-metastatic | 26 (29.9) |
| Metastatic | 61 (70.1) |
| Cell type | |
| Adenocarcinoma | 82 (94.3) |
| Adenosquamous carcinoma | 4 (4.6) |
| Mucinous carcinoma | 1 (1.1) |
| Site of tissue acquisition | |
| Primary tumor | 41 (47.1) |
| Liver | 33 (37.9) |
| Peritoneum | 5 (5.7) |
| Others* | 8 (9.2) |
| Method of tissue acquisition | |
| Ultrasound-guided needle biopsy | 36 (41.4) |
| Surgical resection | 25 (28.7) |
| Fine-needle aspiration/biopsy | 20 (23.0) |
| Others** | 6 (6.9) |
| Prior chemotherapy before tissue acquisition | 13 (14.9) |
Data are presented as the median (range) or number (%).
*Stomach (n = 2), duodenum (n = 2), neck lymph node (n = 2), bile duct (n = 1), and lungs (n = 1). **Biopsy from stomach or duodenum invasion (n = 4), biopsy from the bile duct through endoscopic retrograde cholangiopancreatography (n = 1), and percutaneous core needle biopsy of lung metastasis (n = 1).