The Study of High-protein Nutritional Support Impact on Postoperative Outcomes in Patients With Primary Lung Cancer

Inclusion Criteria:

* Presence of morphological verification of non-small cell lung cancer (NSCLC) without distant metastases;
* Appointment of surgical treatment for primary lung cancer with anatomical resection of the lung (lobectomy, bilobectomy or pneumonectomy);
* Nutritional deficiency or risk of its development (≥3 points on the Nutrition Risk Screening 2002 (NRS-2002) scale);
* No history of nutritional support;
* ECOG (Eastern Cooperative Oncology Group Performance Status Scale) score 0 - 2;
* Life expectancy over 3 months;
* Absence of serious diseases of the gastrointestinal tract, disorders of the liver, kidneys, systemic blood diseases and metabolic disorders at the time of inclusion in the study;
* Absence of severe uncontrolled concomitant chronic diseases and acute diseases (including infectious ones);
* Availability of signed informed consent for inclusion in the study and processing of personal data

Exclusion Criteria:

* Terminal state of the patient, ECOG (Eastern Cooperative Oncology Group Performance Status Scale) 3-4;
* State of refractory cachexia;
* Bleeding, serious injury or blood transfusions in the previous 6 months;
* Decay / abscess in the area of the tumor lesion;
* Presence at the same time of a tumor process of another localization, metastatic lesion of the lungs;
* The presence of concomitant diseases in the stage of decompensation;
* Pregnancy or lactation;
* Allergy to or intolerance to any of the components of Nutridrink Compact Protein, galactosemia, allergy to cow's milk proteins;
* The presence of contraindications to the use of enteral nutrition
* Participation in another study currently or in the past 30 days;
* Any other medical or non-medical reason that, in the physician's opinion, may prevent the patient from participating in the study