Ovarian cysts are benign lesions, often manifested as menstrual abnormalities, the wall of the cyst is visible on examination, containing fluid, surgical resection is an option when the diameter is >5cm, and rarely malignant. Ovarian tumors are more insidious in the early stage, and in the late stage, they may manifest as lower abdominal discomfort, abdominal mass or even ascites, etc. They are often solid masses, and in principle, they need to be surgically resected. 1. Clinical manifestations: Ovarian cysts are benign lesions, often manifested as menstrual abnormalities. Ovarian tumors include benign and malignant tumors. Benign tumors have no obvious symptoms and are often found during physical examination; malignant tumors grow rapidly and are very easy to spread and metastasize, which are mainly manifested as discomfort in the lower abdomen, abdominal masses, ascites, and so on. 2. Imaging examination: ovarian cysts have cystic walls and contain fluid, but the tumor is often solid. 3. Treatment: Conservative treatment is enough when the ovarian cyst is small, but surgery is needed if the diameter of ovarian cyst is more than 5cm. Ovarian tumors, no matter benign or malignant, should be treated with surgery in principle, and if malignant, combined with radiotherapy is needed after surgery. 4. Prognosis: Ovarian cysts rarely develop malignant changes, while malignant ovarian tumors are prone to metastasis and have a poor prognosis. If there are patients with ovarian cysts or ovarian tumors, they should seek medical treatment in time for relevant examinations and standardized treatment.