The enhancement is immediate, and the enhancement is earlier than that of the surrounding normal tissues, and the enhancement fades more quickly. In the venous stage, the enhancement of the mass is less than that of the surrounding normal tissues, but if the enhancement becomes more pronounced at the end, it may be a benign hemangioma. The enhancement of malignant tumors is fast in and fast out, while the enhancement of benign tumors such as hemangiomas is slow in and slow out. However, sometimes it is not easy to distinguish malignant from benign by enhancement alone, so further examination is needed, even after surgery to remove the tumor and send it for pathological examination to determine whether it is benign or malignant.