Gefitinib

PFS is the time from randomisation until the date of objective disease progression as defined by Response Evaluation Criteria In Solid Tumours (RECIST version 1.1) or death (by any cause in the absence of progression). Progression is defined using RECIST (v1.1), as at least a 20% increase in the sum of diameters of target lesions, taking as reference the smallest sum on study. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5mm.

PFS is the time from randomisation until the date of objective disease progression as defined by Response Evaluation Criteria In Solid Tumours (RECIST version 1.1) or death (by any cause in the absence of progression). Progression is defined using RECIST (v1.1), as at least a 20% increase in the sum of diameters of target lesions, taking as reference the smallest sum on study. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5mm.

PFS was defined as the interval from the date of randomization to the date of objective disease progression (as per RECIST) or the date of death (from any cause) in the absence of objective disease progression. The median PFS in months is presented here.

Assessment of the long-term safety profile of ZD1839 therapy by assessing the incidence of adverse events. Any adverse events (AEs) and serious adverse events (SAEs) occurring during treatment and any SAEs occurring within 30 days after stopping the trial drug must be followed to resolution unless, in the investigator's opinion, the condition is unlikely to resolve because of the patient's underlying disease

Assessment of the long-term safety profile of ZD1839 therapy by assessing the incidence of adverse events. Any adverse events (AEs) and serious adverse events (SAEs) occurring during treatment and any SAEs occurring within 30 days after stopping the trial drug must be followed to resolution unless, in the investigator's opinion, the condition is unlikely to resolve because of the patient's underlying disease.

Assessment of the long-term safety profile of ZD1839 therapy by assessing the incidence of adverse events. Any adverse events (AEs) and serious adverse events (SAEs) occurring during treatment and any SAEs occurring within 30 days after stopping the trial drug must be followed to resolution unless, in the investigator's opinion, the condition is unlikely to resolve because of the patient's underlying disease.

Assessment of the long-term safety profile of ZD1839 therapy by assessing the incidence of adverse events. Any adverse events (AEs) and serious adverse events (SAEs) occurring during treatment and any SAEs occurring within 30 days after stopping the trial drug must be followed to resolution unless, in the investigator's opinion, the condition is unlikely to resolve because of the patient's underlying disease.

To assess the efficacy of various sequences. CR (per RECIST 1.1 as assessed by the local/site Investigator) is defined as the disappearance of all target and non-target lesions. Confirmed complete response rate (CR rate) is defined as the number (%) of patients with a confirmed overall response of CR and was based on the evaluable analysis set.

Objective Response Rate is the sum of Complete response (CR) and Partial Response (PR) response. Evaluated by recist criteria v 1.1., for target lesions and assesed by CT or MRI: Complete Response (CR), Disapperance of all target lesions; Partial Response (PR),\>=30% decrease in the sum of longest diamteter of target lesions; Objective response rate (RR)=CR+PR

Clinical benefit rate is the sum of patients with a best visit response of Complete Response, Partial Response or Stable Desease Objective Response Rate is the sum of Complete response (CR) and Partial Response (PR) response. Evaluated by recist criteria v 1.1., for target lesions and assesed by CT or MRI: Complete Response (CR), Disapperance of all target lesions; Partial Response (PR),\>=30% decrease in the sum of longest diamteter of target lesions, Stable Desease (SD) defined as no progression for\>= 6 weeks. Objective response rate (RR)=CR+PR

Objective Response Rate (ORR) is defined as participants who had complete response (CR) or partial response(PR) divided by the total number of patients. RECIST criteria: CR = disappearance of all target lesions PR = 30% decrease in the sum of the longest diameter of target lesions PD = 20% increase in the sum of the longest diameter of target lesions SD (stable disease) = small changes that do not meet above criteria

A patient demonstrated local disease control at 2 years if there was no evidence of failure of treatment. Failure was defined as the patient having objective disease progression (as per RECIST) inside the original irradiated area, at an isodose level (between 20% and 95%), or death.

Interval between date of randomization and earliest date of objective disease progression per RECIST criteria or death due to any cause in the absence of progression

To estimate TTP in the 2 treatment arms of postmenopausal patients with newly diagnosed metastatic breast cancer

ORR: Complete Response (CR) + Partial Response (PR). Response rate for Elderly (\> 70 years) previously untreated patients with Stage IIIb (With Malignant Pleural Effusion (MPE)) or IV non-small cell lung cancer (NSCLC) receiving Taxotere + ZD1839. Best clinical response to treatment with combination was determined using Response Evaluation Criteria in Solid Tumors (RECIST V1.0): \* Complete Response (CR)- Disappearance of all target lesions; \* Partial Response (PR)- At least a 30% decrease in the sum of the longest diameter (LD) of target lesions, taking as reference the baseline sum LD; \* Progressive Disease (PD)- At least a 20% increase in the sum of the LD of target lesions, taking as reference the smallest sum LD recorded since the treatment started or the appearance of one or more new lesions; \* Stable Disease (SD)- Neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for PD, taking as reference the smallest sum LD since the treatment started.

The feasibility of combination gefitinib/osimertinib dosing will be determined through evaluation of the number of patients in each cohort who are able to remain on combination therapy for 6 x 28 day cycles.

AEs: Type, incidence, severity, seriousness and relationship to study medications of adverse events (AE) (graded by the National Cancer Institute \[NCI\] Common Terminology Criteria for Adverse Events \[CTCAE\]; Safety Labs: Blood and urine samples for determination of clinical chemistry, hematology, coagulation, thyroid function tests and urinalysis will be taken at the visits; any laboratory abnormalities, and including dose-limiting toxicities (DLTs), ECG measurements and Creatinine Clearance

The primary objective of this phase 1 study is to determine the safety and tolerability of oral Gefitinib in combination with three escalating doses of Tremelimumab and to establish a recommended phase 2 dose. Overall safety profile will be characterized by type, frequency, severity (graded using the National Cancer Institute Common Terminology Criteria for Adverse Events \[NCICTCAE\] Version 4.03), timing of adverse events and laboratory abnormalities in the first and in the following cycles