A teratoma 60x50mm on the left ovary requires surgery, the choice of which depends on whether the teratoma occupies the entire normal ovarian tissue. 1. Teratoma: Teratomas can be benign or malignant and are prone to complications such as teratoma torsion or ischemia and necrosis. Ovarian teratoma has reached 60X50mm in size, which needs early surgery and biopsy after surgery to exclude the possibility of cancer. 2. Selection of surgical method: Regarding the question of whether to remove the ovary, if the teratoma does not occupy the whole ovarian tissue, in this case, the teratoma can be removed and the remaining ovarian tissue can be preserved; if the teratoma occupies most of the normal ovarian tissue, and it is impossible to remove the teratoma alone, in this case, the left side of the ovary needs to be removed. If the teratoma on the left ovary reaches 60X50mm, it is best to go to a regular hospital for early surgery to avoid adverse consequences.