...(1) Patients with non-small cell lung adenocarcinoma (or adenocarcinoma with initial stage IIIB/IV) that are not suitable for radical surgery or radiotherapy confirmed by pathological histology may be selected if they have been treated with adjuvant chemotherapy for more than 6 months; (2) EGFR gene detection 21 exon L858R mutation; (3) Aged 18-75 years old; (4) ECOG 0-3 points; (5) Asymptomatic brain metastasis; (6) There are imaging evaluable lesions. ...

...Patients with single primary lung cancer, a full set of tumor marker tests, blood biochemistry tests and related routine blood tests, enhanced CT of the chest, CT or ultrasound of the abdomen (liver, gallbladder, pancreas, spleen, kidneys, and adrenal glands), ultrasound of the cervical and supraclavicular lymph nodes, MR of the head or CT of the head, and whole-body bone imaging were all perfected to exclude metastasis before surgery; Complete surgical resection of the tumor with guaranteed negative margins (R0), the patient's surgical approach can be lobectomy, segmental resection, wedge resection of the lung, and regional lymph node sampling;Postoperative pathologically confirmed stage I lung adenocarcinoma (according to the 8th edition of the AJCC TNM staging system for lung cancer) with micropapillary or solid-type components;and had a confirmed EGFR mutation(exon 19 deletion or exon 21 L858R);Eligible patients were between 18 and 75 years of age; had an Eastern Cooperative Oncology Group performance status (ECOG PS) score of 0 or 1....

...- A tumor which harbors either Ex19del or L858R EGFR-TKI-sensitizing mutations, either alone...

...- EGFR mutation was detected by Amplification Refractory Mutation System(ARMS) and confirmed to be one of the 2 common EGFR mutations known to be associated with EGFR-TKI （epidermal growth factor receptor tyrosine kinase inhibitors）sensitivity (Ex19del, L858R)....

...- A tumour which harbours one of the 2 EGFR mutations (Ex19del, L858R) ,without KRAS mutation...

...- Unresectable stage IIIA-IIIB Non-small Cell Lung Cancer, histology or cytology confirmed lung adenocarcinoma, pathological specimens with EGFR 19 del and/or 21 L858R gene mutation detected by amplification refractory mutation system method...

...- Pathologic confirmation of lung adenocarcinoma with measurable disease, defined as at least one lesion that can be accurately measured in at least one dimension (longest diameter to be recorded on CT); Patients must have previously untreated locally advanced or metastatic NSCLC; Patients must have lung cancer with a documented EGFR activating mutation (exon 19 deletion, L858R)....

...- EGFR activating mutation (exon 19 deletion, L858R) is required...

...(1) Those who meet the diagnostic criteria for primary bronchopulmonary carcinoma, histologically or cytologically confirmed as adenocarcinoma, with EGFR 21 exon L858R and EGFR 19 exon deletion mutations identified by Arm method or second generation sequencing. ...

...EGFR sensitive mutation (exon 19 deletion mutation or exon 21 L858R) detected by histology or peripheral blood; 5. ...

Pts with advanced LUAD, harboring EGFR exon 21 L858R mutation, and who received ico250 for more than 20 days without chemotherapy or immunotherapy were reviewed....Overall, ORR was 30.0%, DCR was 80.0%, median DoT was 8.0mos (95%CI, 3.4-12.6), median PFS was 12.9mos (95%CI, 8.2-17.6) and median OS was not reached....High-dose icotinib could be considered whatever the previous treatment and basic characteristics of LUAD pts with exon 21 L858R mutation.