Comparatively speaking, ovarian carcinoma in situ is at an earlier stage of cancer, but it still belongs to malignant tumors, which need to be paid great attention to and actively treated. Ovarian carcinoma in situ is a relatively small lesion that has not yet penetrated the basement membrane and infiltrated downward, which is an early stage of cancer, and patients often do not have obvious clinical symptoms. Most of the carcinoma in situ can be cured by aggressive surgical resection without the need of adjuvant radiotherapy and chemotherapy, so the prognosis is generally better, and the cure rate is more than 90%. Therefore, compared with other stages of ovarian cancer, ovarian carcinoma in situ has better treatment effect. However, due to small lesions and inconspicuous symptoms, it is often difficult to detect. Those who have high risk factors for ovarian cancer, especially those with family history of ovarian cancer and genetic mutation, should undergo timely screening for ovarian cancer, especially ultrasound and tumor marker examination, so as to strive for early detection and early treatment.