Whether gastrin-releasing peptide precursor 70pg/mL more is serious needs to be combined with the specific cause, if it is caused by benign diseases such as chronic atrophic gastritis, it is usually not serious, if it is caused by malignant diseases such as small cell lung cancer, it is more serious. Gastrin-releasing peptide precursor is the precursor structure before the generation of gastrin-releasing peptide, which is more stable in the blood, and mainly exists in the respiratory tract, gastrointestinal tract and central nervous system. It is currently the preferred sensitive tumor marker for lung cancer, and the normal value for normal adults is <50pg/mL. 1. Benign diseases: common benign diseases causing elevated gastrin-releasing peptide precursor include chronic atrophic gastritis, certain urinary system diseases or respiratory system diseases, etc. After active treatment, gastrin-releasing peptide precursor can be reduced to normal, and these conditions are usually not serious. 2. Malignant diseases: commonly found in small cell lung cancer, medullary thyroid cancer, etc. In these cases, the elevation of gastrin-releasing peptide precursor is considered to be more serious. When gastrin-releasing peptide precursor is elevated, it is recommended to have timely examination to clarify the cause and follow the doctor's instructions to standardize the treatment so as to avoid delaying the condition.