Efficacy and Safety of Ensartinib in Neoadjuvant Therapy for Stage IIA - IIIB (Operable or Potentially Operable) ALK-Positive Lung Adenocarcinoma ：A Multicenter, Real-World Clinical Study

• Age ≥18
• Histologically or cytologically confirmed lung adenocarcinoma
• Evaluated resectable TNM stage IIA-IIIB (operable or potentially operable) non-small cell lung cancer (NSCLC)
• Alk-positive as determined by immunohistochemistry (IHC), fluorescence in situ hybridization (FISH), next-generation sequencing (NGS), or other non-specific sequencing methods，before treatment with ALK inhibitors
• Measurable lesions were determined with the use of the Response Evaluation Criteria in Solid Tumors (RECIST 1.1 criteria) on CT scans
• Magnetic resonance imaging (MRI) or CT scans of the brain show no metastatic disease
• Tumors contained components of squamous cell carcinoma, large-cell neuroendocrine carcinoma, or small-cell carcinoma
• Severe infections, including COVID-19, including but not limited to hospitalization due to complications of infection within the 4 weeks prior to starting study treatment
• Have not received chemotherapy, radiotherapy, or biological therapy
• Hemoglobin ≥100 g/L(which can be maintained or exceeded by blood transfusion); Absolute neutrophil count ≥2.0×109/L; Platelet count ≥100×109/L
• Total bilirubin ≤1.5 times upper limit of normal; ALT and AST≤2.5 times the upper limit of normal; CREA ≤1.5 times the upper limit of normal and CREA clearance ≥60mL/min
• Women of childbearing age (15 to 49 years) must undergo a urine pregnancy test within 7 days before starting treatment and the result is negative
• Informed consent is obtained from patients or their legal representatives
• Able to swallow oral medications normally
• ECOG behavior status score is 0 to 1
• Men and women of reproductive age agree to use a reliable method of contraception before entering the trial, during the study and up to eight weeks after discontinuation
• Stable health status, including no acute exacerbations of chronic diseases, serious infections, or major surgeries during the first 4 weeks of enrollment, as indicated in other inclusion/exclusion criteria

Exclusion Criteria:

• Have received any systemic anti-cancer treatment for locally advanced non-small cell lung cancer, including chemotherapy, biotherapy (including ALK-TKI), immunotherapy, or any investigational drug
• PET-CT scan or biopsy results showing unresectable stage III and IV disease with distant metastasis (including malignant pleural effusion)
• Patients who had a cancer other than NSCLC within 5 years before the initiation of study treatment
• Allergy to ensartinib or any of the ingredients in this product
• Previous history of interstitial lung disease, drug-induced interstitial disease, radiation pneumonia requiring hormone therapy, or any clinically proven active interstitial lung disease;Baseline CT scans found idiopathic pulmonary fibrosis
• Refractory nausea and vomiting, chronic gastrointestinal disease, inability to swallow preparations, or previous major bowel resection resulting in inadequate absorption of ensartinib
• Any unstable systemic illness, including active infection, uncontrolled hypertension, unstable angina, angina with onset within the last 3 months, congestive heart failure (≥ New York Heart Association [NYHA] class II), myocardial infarction (within 6 months before enrollment), severe arrhythmias requiring medical therapy, or hepatic, renal, or metabolic disease
• Human immunodeficiency virus (HIV) infection
• Pregnant or lactating women
• A definite past history of neurological or psychiatric disorders, including epilepsy or dementia
• History of organ transplantation
• Rheumatic immune-related diseases
• Other cases that the researcher deemed unsuitable for enrollment