A Phase I Study of TAS-102 in Patients With Advanced Solid Tumors With Renal Impairment

This is a Phase 1, open-label study to evaluate the safety, tolerability, and
pharmacokinetics of TAS-102 in patients with advanced solid tumors with varying degrees of
renal impairment. The study is conducted in 2 parts: the Pharmacokinetic Part (Cycle 1) and
the Extension Part (Cycles 2 and beyond). Patients may continue to receive treatment with
TAS-102 during the study extension part only after completion of the Pharmacokinetic Part.

Inclusion

1. Has provided written informed consent

2. Has advanced solid tumors (excluding breast cancer)

3. Has normal renal function, mild, moderate, or severe renal impairment and is not on
dialysis

4. ECOG performance status of ≤2

5. Is able to take medications orally

6. Has adequate organ function

7. Women of childbearing potential must have a negative pregnancy test and must agree to
adequate birth control if conception is possible. Males must agree to adequate birth
control.

Exclusion

1. Certain serious illnesses or medical condition(s)

2. Has had certain other recent treatment e.g. major surgery, anticancer therapy,
extended field radiation, received investigational agent, within the specified time
frames prior to study drug administration

3. Has received TAS-102

4. Has unresolved toxicity of greater than or equal to CTCAE Grade 2 attributed to any
prior therapies

5. Is a pregnant or lactating female