Table 1.
Clinicopathologic characteristics of the cohort
| Clinical characteristics | Number (%) | |
|---|---|---|
| Sex | Female | 160 (69) |
| Male | 73 (31) | |
| Ethnicity/race | Caucasian/White | 147 (63) |
| African American/Black | 29 (12) | |
| Asian | 29 (12) | |
| Hispanic | 9 (4) | |
| Unknown | 19 (8) | |
| Age (at collection) | Median (range) | 66 (37–90) |
| Stage (at collection) | I | 3 (1) |
| II | 34 (15) | |
| III | 41 (18) | |
| IV | 155 (67) | |
| Sample analyzed | Primary only | 129 (55) |
| Metastasis only | 95 (41) | |
| Primary and metastasis | 5 (2) | |
| 2 or more metastases (no primary) | 4 (2) | |
| Histologic Subtype | Adenocarcinoma | 199 (85) |
| Carcinoma with squamous differentiation | 23 (10) | |
| Small cell carcinoma | 6 (3) | |
| Other poorly differentiated neuroendocrine carcinomas | 5 (2) | |
| Tumor grade | Well-differentiated | 8 (3%) |
| Moderately differentiated | 95 (41%) | |
| Poorly differentated | 121 (52%) | |
| Unknown (cytology specimens) | 9 (4%) | |
| Microsatellite instability | Stable | 227 (97%) |
| Instable | 6 (3%) | |
| Cholelithiasis (primary samples, n=134) | Present | 46 (34%) |
| Absent | 23 (17%) | |
| Unknown | 65 (49%) |