Inclusion Criteria:

1. Patients with histologically or cytologically confirmed small cell lung cancer

2. Regarding a limited disease, the disease in a patient, who had concurrent
chemoradiation therapy before, is relapsed or progressing, the patient should have
received the first line platinum-based anticancer therapy. The disease should be
progressing/relapsed during or after the previous treatment.

3. Regarding an extensive disease, the progression/relapse of the disease during or
after the first line platinum-based anticancer therapy should be confirmed.

4. Patient with asymptomatic or treated brain metastasis.

5. Patients without current concomitant chemotherapy

6. Patients without current concomitant radiotherapy

7. Patients who are not receiving chronic treatment with steroids or another
immunosuppressive agent.

8. Patients with at least one measurable lesion according to the Response Evaluation
Criteria in Solid Tumors (RECIST).

9. Patients aged 18 years or older

10. ECOG performance status 0-2

11. Adequate organ function as evidenced by the following; Absolute neutrophil count >
1.5 x 109/L; platelets > 100 x 109/L; hemoglobin > 9g/dL; -; total bilirubin ≤1.5
UNL; AST and/or ALT < 5 UNL; creatinine clearance ≥ 50mL/min.

12. Patients who signed and dated the informed consent form prior to specific study
procedures.

13. Patients who can comply with the scheduled follow-up and toxicity management
procedure.'

Exclusion Criteria:

1. Patients with history of treatment with mTOR inhibitors

2. Pregnant with gastrointestinal problem impairing absorption of drugs

3. Patients who could not use appropriate method of contraception

4. Pregnant or feeding patients

5. Other medically ill patients

6. Severe heart/pulmonary disease

7. DM patients

8. Other malignancy except cured skin cancer or uterine cervix carcinoma in situ

9. High cholesterolemia greater than grade 3

10. Patients with symptomatic brain metastasis

11. Chronic hepatitis or liver cirrhosis (patients with HBsAg positive, IgM anti-HBc
positive or HCV Ab positive)

12. Patients receiving immunosuppressant