Table I.
Characteristic | No. of patients (%) |
---|---|
Sex | |
Female | 16 (51.61) |
Male | 15 (48.39) |
Localization | |
Left colon | 12 (38.71) |
Right colon | 13 (41.94) |
Rectum | 6 (19.35) |
Pathological stage at the time of ctDNA analysis | |
Synchronous | 18 (58.06) |
Metachronous | 13 (41.94) |
Histological type | |
Adenocarcinoma | 24 (87.10) |
Mucinous adenocarcinoma | 7 (12.90) |
Grading | |
G2 | 19 (61.29) |
G3 | 3 (9.68) |
Undefined | 9 (29.03) |
Metastatic sites at the time of ctDNA analysis | |
Only liver | 8 (25.81) |
Only lung | 1 (3.23) |
Peritoneum | 4 (12.90) |
Multiple | 18 (58.06) |
Number of metastatic sites at the time of ctDNA analysis | |
1 | 13 (41.93) |
2 | 12 (38.71) |
≥3 | 6 (19.36) |
Surgery for primary tumor | |
No | 11 (35.48) |
Yes | 20 (64.52) |
Tissue used for molecular analysis of RAS mutational status | |
Primary tumor | 23 (74.19) |
Metastasis | 8 (25.81) |
ctDNA, circulating tumor DNA.