If ultrasound examination reveals solid space-occupying lesions in the left adnexa, women are usually treated with surgery, and whether chemotherapy is needed will be determined according to the results of pathological examination after surgery. If ultrasound examination reveals solid space-occupying lesions in the left adnexa, one should not be careless because such solid space-occupying lesions have a higher chance of malignant transformation, which means that they may be ovarian cancer. Ovarian cancer is a common malignant tumor in women, which can occur at any age, and the mortality rate is the highest among gynecological malignant tumors. Early lesions are not easy to be detected, and when symptoms appear, it is basically in the late stage. If ovarian cancer is suspected, it needs to be treated by surgery as early as possible, and then pathological examination is done to clarify the diagnosis and stage the malignant tumor pathologically. If it is determined that it is malignant tumor after surgery, generally it is necessary to take the approach of chemotherapy, for example, it can choose paclitaxel and carboplatin, and so on.