The number of patients is not sufficient to support the project.

The occurrence and progression of lung cancer is related to visceral adipose tissue (VAT). Epicardial adipose tissue (EAT) is a kind of VAT, producing a variety of inflammatory cytokines and adipokines, participating in the formation of local inflammation, promoting the formation of pre-thrombotic state, and leading to the occurrence of thromboembolism. Patients with lung cancer have increased inflammatory response and are more prone to suffer thrombosis. However, in lung cancer patients, the clinical correlation between EAT and pulmonary embolism has not been reported. Objective: To analyze the risk factors of poor prognosis in lung cancer patients with PE, and to explore the predictive value of EAT in pulmonary embolism events and death in lung cancer patients. Methods: EAT volume and density, as well as anthropometric and blood biomarkers, were evaluated in a sample of lung cancer patients, half with pulmonary embolism and half without. The incidence of adverse prognosis and related factors were followed up by telephone.

Inclusion Criteria:

• The pathological diagnosis was lung cancer
• Pulmonary artery was evaluated by CTA during hospitalization.

Exclusion Criteria:

• Patients with incomplete clinical data
• Patients with no follow-up data
• Patients with a history of PE before diagnosis of lung cancer

This study was conducted on patients with a confirmed diagnosis of Lung Cancer who were admitted to the First Affiliated Hospital of Xi'an Jiaotong University from 1 January 2012 to 31 December 2021. Patients who did not meet any of the inclusion criteria or met any of the exclusion criteria were excluded. The subjects were divided into PE group and control group according to the results of CTPA examination, and the patients in the two groups were matched by gender and age 1:1 tendency score.