Trial Outcomes & Findings for Initial Attack on Latent Metastasis Using TAS-102 for ct DNA Identified Colorectal Cancer Patients After Curative Resection (NCT NCT04457297)

NCT ID: NCT04457297

Last Updated: 2026-01-21

Results Overview

The time from the date of enrollment to any of the following events, whichever occurs first: a relapse, the first development of a secondary colorectal cancer lesion other than a relapse and death from any cause.

Recruitment status

COMPLETED

Study phase

PHASE3

Target enrollment

243 participants

Primary outcome timeframe

Up to 3 years

Results posted on

2026-01-21

Participant Flow

Participant milestones

Participant milestones
Measure
Trifluridine and Tipiracil
trifluridine and tipiracil: Trifluridine and tipiracil will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Placebo
Placebo: Placebo will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Overall Study
STARTED
122
121
Overall Study
COMPLETED
122
121
Overall Study
NOT COMPLETED
0
0

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

Initial Attack on Latent Metastasis Using TAS-102 for ct DNA Identified Colorectal Cancer Patients After Curative Resection

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Trifluridine and Tipiracil
n=122 Participants
trifluridine and tipiracil: Trifluridine and tipiracil will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Placebo
n=121 Participants
Placebo: Placebo will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Total
n=243 Participants
Total of all reporting groups
Age, Categorical
<=18 years
0 Participants
n=37 Participants
0 Participants
n=44 Participants
0 Participants
n=40 Participants
Age, Categorical
Between 18 and 65 years
52 Participants
n=37 Participants
57 Participants
n=44 Participants
109 Participants
n=40 Participants
Age, Categorical
>=65 years
70 Participants
n=37 Participants
64 Participants
n=44 Participants
134 Participants
n=40 Participants
Age, Continuous
67.0 years
n=37 Participants
65.0 years
n=44 Participants
66.0 years
n=40 Participants
Sex: Female, Male
Female
51 Participants
n=37 Participants
51 Participants
n=44 Participants
102 Participants
n=40 Participants
Sex: Female, Male
Male
71 Participants
n=37 Participants
70 Participants
n=44 Participants
141 Participants
n=40 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=37 Participants
0 Participants
n=44 Participants
0 Participants
n=40 Participants
Race (NIH/OMB)
Asian
0 Participants
n=37 Participants
0 Participants
n=44 Participants
0 Participants
n=40 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=37 Participants
0 Participants
n=44 Participants
0 Participants
n=40 Participants
Race (NIH/OMB)
Black or African American
0 Participants
n=37 Participants
0 Participants
n=44 Participants
0 Participants
n=40 Participants
Race (NIH/OMB)
White
0 Participants
n=37 Participants
0 Participants
n=44 Participants
0 Participants
n=40 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=37 Participants
0 Participants
n=44 Participants
0 Participants
n=40 Participants
Race (NIH/OMB)
Unknown or Not Reported
122 Participants
n=37 Participants
121 Participants
n=44 Participants
243 Participants
n=40 Participants
Region of Enrollment
Japan
121 participants
n=37 Participants
121 participants
n=44 Participants
242 participants
n=40 Participants
Region of Enrollment
Taiwan
1 participants
n=37 Participants
0 participants
n=44 Participants
1 participants
n=40 Participants

PRIMARY outcome

Timeframe: Up to 3 years

Population: Disease free survival 1 (DFS1) was assessed in Full Analysis Set.

The time from the date of enrollment to any of the following events, whichever occurs first: a relapse, the first development of a secondary colorectal cancer lesion other than a relapse and death from any cause.

Outcome measures

Outcome measures
Measure
Placebo
n=121 Participants
Placebo will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Trifluridine and Tipiracil
n=122 Participants
Trifluridine and tipiracil will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Disease-free Survival 1 (DFS1)
5.55 Months
Interval 4.17 to 6.47
9.30 Months
Interval 7.82 to 10.84

SECONDARY outcome

Timeframe: Up to 2 years

Population: Rate of Conversion to Negative ctDNA was assessed in Full Analysis Set.

This rate is defined as the proportion of subjects who became negative for ctDNA at the test immediately after completion of study treatment.

Outcome measures

Outcome measures
Measure
Placebo
n=121 Participants
Placebo will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Trifluridine and Tipiracil
n=122 Participants
Trifluridine and tipiracil will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Rate of Conversion to Negative ctDNA
12.4 Percentage
Interval 7.1 to 19.6
17.2 Percentage
Interval 11.0 to 25.1

SECONDARY outcome

Timeframe: Up to 3 years

Population: Disease free survival 2 (DFS2) was assessed in Full Analysis Set.

The time from the date of enrollment to any of the following events, whichever occurs first: a relapse, development of a cancer lesion other than a relapse (secondary cancer), and death from any cause. For survives with no evidence of recurrence, DFS2 data will be censored at the last imaging date of confirmed no recurrence. Subjects for which no imaging have been performed, DFS2 data will be censored at the date of enrollment.

Outcome measures

Outcome measures
Measure
Placebo
n=121 Participants
Placebo will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Trifluridine and Tipiracil
n=122 Participants
Trifluridine and tipiracil will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Disease-free Survival 2 (DFS2)
5.55 Months
Interval 4.17 to 6.47
9.30 Months
Interval 7.82 to 10.84

SECONDARY outcome

Timeframe: Up to 3 years

Population: Overall survival (OS) was assessed in Full Analysis Set.

The time from the date of enrollment to the date of death from any cause. In surviving subjects, the last date of confirmation of survival will be treated as the end of this period. In subjects lost to follow-up, the last date of confirmation of survival before loss to follow-up will be treated as the end of this period.

Outcome measures

Outcome measures
Measure
Placebo
n=121 Participants
Placebo will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Trifluridine and Tipiracil
n=122 Participants
Trifluridine and tipiracil will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Overall Survival (OS)
37.26 Months
In the placebo group, an event occurred in the patient with the longest follow-up period, allowing the median to be calculated. However, due to an insufficient number of events, the upper and lower limits of the confidence interval could not be calculated.
NA Months
In the trifluridine and tipiracil group, because the number of events did not reach 50%, the median OS (95% CI) was not reach.

SECONDARY outcome

Timeframe: Up to 3 years

Population: Treatment completion rate was assessed in Full Analysis Set.

This rate had calculated for each eligible subject in accordance with the following equation: Treatment completion rate (%) = number of treatment courses completed/6 × 100

Outcome measures

Outcome measures
Measure
Placebo
n=121 Participants
Placebo will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Trifluridine and Tipiracil
n=122 Participants
Trifluridine and tipiracil will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Treatment Completion Rate
78.79 Percentage of treatment completion
Standard Deviation 25.46
77.87 Percentage of treatment completion
Standard Deviation 30.26

SECONDARY outcome

Timeframe: Up to 1 year

Population: QOL was assessed in Full Analysis Set.

Measure Description: Quality of Life was assessed using two validated instruments: EORTC QLQ-C30 (European Organization for Research and Treatment of Cancer Quality of Life Questionnaire-Core 30) evaluates cancer-specific HRQoL across domains: Global Health Status/QoL (range: 0-100, higher = better global health/QoL), Functional Scales (Physical, Role, Emotional, Cognitive, Social; each range: 0-100, higher = better functioning), Symptom Scales (Fatigue, Nausea/vomiting, Pain, Dyspnoea, Insomnia, Appetite loss, Constipation, Diarrhoea, Financial difficulties): each 0-100 (higher = worse/more severe symptoms). Scores are linearly transformed; subscales are reported individually (not summed). EQ-5D-5L (EuroQOL 5-Dimension 5-Level) measures general health across five dimensions: Index Score (range: -1.000 to 1.000, higher = better health), Visual Analogue Scale (VAS) (range: 0-100, higher = better health). Unit of Measure: scores on a scale. Note: Only Week 24 results are presented.

Outcome measures

Outcome measures
Measure
Placebo
n=121 Participants
Placebo will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Trifluridine and Tipiracil
n=122 Participants
Trifluridine and tipiracil will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
QOL (Week 24 Only)
Global healthstatus/QoL (Week 24)
4.36 scores on a scale
Standard Deviation 22.39
0.00 scores on a scale
Standard Deviation 22.71
QOL (Week 24 Only)
EORTC QLQ-C30 Functional scales: Physical functioning (Week 24)
1.13 scores on a scale
Standard Deviation 9.47
-1.10 scores on a scale
Standard Deviation 13.64
QOL (Week 24 Only)
EORTC QLQ-C30 Functional scales: Role functioning (Week 24)
-3.33 scores on a scale
Standard Deviation 12.57
-3.33 scores on a scale
Standard Deviation 14.27
QOL (Week 24 Only)
EORTC QLQ-C30 Functional scales: Emotional functioning (Week 24)
0.64 scores on a scale
Standard Deviation 13.84
4.22 scores on a scale
Standard Deviation 14.86
QOL (Week 24 Only)
EORTC QLQ-C30 Functional scales: Cognitive functioning (Week 24)
2.56 scores on a scale
Standard Deviation 17.49
0.20 scores on a scale
Standard Deviation 15.75
QOL (Week 24 Only)
EORTC QLQ-C30 Functional scales: Social functioning (Week 24)
1.28 scores on a scale
Standard Deviation 12.95
-2.55 scores on a scale
Standard Deviation 12.99
QOL (Week 24 Only)
EORTC QLQ-C30 Symptom scales: Fatigue (Week 24)
-2.74 scores on a scale
Standard Deviation 16.90
3.14 scores on a scale
Standard Deviation 16.76
QOL (Week 24 Only)
EORTC QLQ-C30 Symptom scales: Nausea and vomiting (Week 24)
10.26 scores on a scale
Standard Deviation 7.96
4.12 scores on a scale
Standard Deviation 1.28
QOL (Week 24 Only)
EORTC QLQ-C30 Symptom scales: Pain (Week 24)
1.54 scores on a scale
Standard Deviation 15.23
-1.18 scores on a scale
Standard Deviation 15.17
QOL (Week 24 Only)
EORTC QLQ-C30 Symptom scales: Dyspnoea (Week 24)
0.51 scores on a scale
Standard Deviation 17.17
1.18 scores on a scale
Standard Deviation 18.86
QOL (Week 24 Only)
EORTC QLQ-C30 Symptom scales: Insomnia (Week 24)
-0.51 scores on a scale
Standard Deviation 15.01
-0.39 scores on a scale
Standard Deviation 25.46
QOL (Week 24 Only)
EORTC QLQ-C30 Symptom scales: Appetite (Week 24)
1.03 scores on a scale
Standard Deviation 13.14
5.49 scores on a scale
Standard Deviation 21.73
QOL (Week 24 Only)
EORTC QLQ-C30 Symptom scales: Constipation (Week 24)
3.08 scores on a scale
Standard Deviation 20.18
2.75 scores on a scale
Standard Deviation 20.71
QOL (Week 24 Only)
EORTC QLQ-C30 Symptom scales: Diarrhoea (Week 24)
4.62 scores on a scale
Standard Deviation 22.15
6.67 scores on a scale
Standard Deviation 22.30
QOL (Week 24 Only)
EORTC QLQ-C30 Symptom scales: Financial difficulties (Week 24)
-2.05 scores on a scale
Standard Deviation 20.31
-4.31 scores on a scale
Standard Deviation 21.07
QOL (Week 24 Only)
EQ-5D-5L Index Score (Week 24)
0.1110 scores on a scale
Standard Deviation 0.0986
-0.0019 scores on a scale
Standard Deviation 0.0170
QOL (Week 24 Only)
EQ-5D-5L VAS (Week 24)
1.6 scores on a scale
Standard Deviation 13.0
1.2 scores on a scale
Standard Deviation 12.7

Adverse Events

Trifluridine and Tipiracil

Serious events: 6 serious events
Other events: 120 other events
Deaths: 0 deaths

Placebo

Serious events: 0 serious events
Other events: 69 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
Trifluridine and Tipiracil
n=122 participants at risk
Trifluridine and tipiracil will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Placebo
n=121 participants at risk
Placebo will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
Adenocarcinoma gastric
0.82%
1/122 • Up to 3 years
0.00%
0/121 • Up to 3 years
Nervous system disorders
Cerebral haemorrhage
0.82%
1/122 • Up to 3 years
0.00%
0/121 • Up to 3 years
Nervous system disorders
Cerebral infarction
0.82%
1/122 • Up to 3 years
0.00%
0/121 • Up to 3 years
Cardiac disorders
Myocardial infarction
0.82%
1/122 • Up to 3 years
0.00%
0/121 • Up to 3 years
Respiratory, thoracic and mediastinal disorders
Aspiration
0.82%
1/122 • Up to 3 years
0.00%
0/121 • Up to 3 years
Gastrointestinal disorders
Ileus
1.6%
2/122 • Up to 3 years
0.00%
0/121 • Up to 3 years
Gastrointestinal disorders
Intestinal obstruction
0.82%
1/122 • Up to 3 years
0.00%
0/121 • Up to 3 years

Other adverse events

Other adverse events
Measure
Trifluridine and Tipiracil
n=122 participants at risk
Trifluridine and tipiracil will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
Placebo
n=121 participants at risk
Placebo will be orally administered twice daily on Days 1 to 5 and Days 8 to 12. The administration will be repeated until completion of 6 courses(one course consists of 28 days) or until any discontinuation criterion is met.
General disorders
Fatigue
14.8%
18/122 • Up to 3 years
5.0%
6/121 • Up to 3 years
General disorders
Malaise
15.6%
19/122 • Up to 3 years
5.8%
7/121 • Up to 3 years
General disorders
Pyrexia
6.6%
8/122 • Up to 3 years
3.3%
4/121 • Up to 3 years
Investigations
Blood bilirubin increased
7.4%
9/122 • Up to 3 years
4.1%
5/121 • Up to 3 years
Investigations
Lymphocyte count decreased
8.2%
10/122 • Up to 3 years
0.83%
1/121 • Up to 3 years
Investigations
Neutrophil count decreased
74.6%
91/122 • Up to 3 years
4.1%
5/121 • Up to 3 years
Investigations
Platelet count decreased
12.3%
15/122 • Up to 3 years
3.3%
4/121 • Up to 3 years
Investigations
White blood cell count decreased
63.9%
78/122 • Up to 3 years
3.3%
4/121 • Up to 3 years
Blood and lymphatic system disorders
Leukopenia
6.6%
8/122 • Up to 3 years
0.00%
0/121 • Up to 3 years
Gastrointestinal disorders
Constipation
5.7%
7/122 • Up to 3 years
5.0%
6/121 • Up to 3 years
Blood and lymphatic system disorders
Anaemia
26.2%
32/122 • Up to 3 years
1.7%
2/121 • Up to 3 years
Blood and lymphatic system disorders
Neutropenia
12.3%
15/122 • Up to 3 years
0.00%
0/121 • Up to 3 years
Metabolism and nutrition disorders
Decreased appetite
22.1%
27/122 • Up to 3 years
1.7%
2/121 • Up to 3 years
Nervous system disorders
Dysgeusia
8.2%
10/122 • Up to 3 years
0.83%
1/121 • Up to 3 years
Nervous system disorders
Headache
5.7%
7/122 • Up to 3 years
1.7%
2/121 • Up to 3 years
Gastrointestinal disorders
Diarrhoea
33.6%
41/122 • Up to 3 years
10.7%
13/121 • Up to 3 years
Gastrointestinal disorders
Nausea
51.6%
63/122 • Up to 3 years
12.4%
15/121 • Up to 3 years
Gastrointestinal disorders
Stomatitis
14.8%
18/122 • Up to 3 years
5.8%
7/121 • Up to 3 years
Gastrointestinal disorders
Vomiting
9.8%
12/122 • Up to 3 years
3.3%
4/121 • Up to 3 years
Skin and subcutaneous tissue disorders
Alopecia
8.2%
10/122 • Up to 3 years
0.00%
0/121 • Up to 3 years

Additional Information

Takayuki Yoshino

National Cancer Center Hospital East

Phone: +81-4-7133-1111

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place