Junctional ovarian mucinous tumors are not cancer. Junctional ovarian mucinous tumor is a kind of tumor with very low degree of malignancy, which is formed by the proliferation of ovarian tissues, and is a kind of ovarian epithelial tumor. This kind of tumor does not have mesenchymal infiltration, and grows slowly, and will not be metastasized to all parts of the body like malignant tumors, and it is a kind of tumor between benign and malignant, and it is not a kind of cancer. Junctional ovarian mucinous tumors are generally larger, most of them occur unilaterally, the diameter is generally larger than 10CM, the surface is relatively smooth, the main treatment is surgery, according to whether the patient has the requirement of reproduction, choose the appropriate surgical method. If there is no requirement for fertility, the uterus and both adnexa can be removed, and if there is a requirement for fertility, the reproductive function can be preserved, and it is usually curable. Although junctional ovarian mucinous tumor is not cancer, patients should also be actively treated and follow the doctor’s instructions for regular review after surgery.