The 100*100 in CT is generally used to describe the size of the lesion, suggesting that a round-like lesion of about 100 millimeters was found. CT is currently a more advanced modern instrument, can use spiral X-ray light source, the body for the whole layer scanning, can be more accurate discovery of the lesion site and lesion type. Clinically, if an abnormality is detected by CT examination, it is necessary to accurately describe the location of the lesion and the size of the lesion. The size of the lesion is generally described by multiplying the long axis and the short axis, generally in millimeters, and 100*100 suggests that a round-like lesion of about 100 millimeters has been found. It is not scientific to analyze the condition from a single test result, and it is recommended to combine clinical symptoms, physical examination, and other auxiliary tests under the guidance of a doctor for a comprehensive analysis of the condition and targeted treatment.