Abstract
Young adult lung cancer is defined as a group of patients refers to whose onset age is less than 40 years old and ≥18 years old. Compare with elder lung cancer, the clinical symptoms of them are not typical, the stage is usually late at the time of discovery, and most of them have regional lymphatic metastasis or distant metastasis. Current study found that young adult lung cancer has a relatively unique genetic background, the abundance of tumor-driving genes is high, and it is closely related to its clinical manifestation and prognosis. Young adult lung cancer is the focus of attention in the field of cancer in recent years. This article reviewed the literature on the clinical features, gene phenotypic characteristics and prognosis of young adult lung cancer in order to provide provide some references and clues for the study on young adult lung cancer.