The aim of the present prospective cohort study (GGN-F) is to study the family aggregation of pulmonary ground glass nodules via the questionnaire survey and to investigate the underlying genetic mechanism via the biobank.

In recent years, with the development of low-dose chest CT screening, more and more ground glass nodules have been found. Meanwhile, presenting as Ground-glass nodule (GGN), the early-stage lung adenocarcinoma patients with lung cancer family history have been emerging increasing in recent years in East Asian.

This prospective cohort study, with both a cross-sectional and a longitudinal part, will include patients with pulmonary ground glass nodule, which were proven malignant disease.

All participants will be asked to complete questionnaire to build the clinical database of GGN patients with detailed family history. Furthermore, blood and surgical tumor samples will be collected as a specific biobank. And the blood samples of other family members of participants will be collected, with their consent and knowledge.

Inclusion Criteria:

1. patients with informed consent;
2. patients with pulmonary ground glass nodule.
3. pathological proved early stage lung cancer.

Exclusion Criteria:

1.not included in the inclusion criteria

All the patients with pulmonary ground glass nodules and pathological proved malignant disease will be enrolled.