I would like to ask what is pre-cancer screening

Pre-cancer screening is currently the main way to detect early cancer and precancerous lesions. There are many ways to check, such as B-ultrasound, X-ray, gastroscopy, colonoscopy, tumor marker examination, MRI examination, etc. The results of the examination generally only provide reference, whether there is cancer, but also need to do histopathological biopsy to /confirm/i.