Endometrial cancer is not necessarily carcinoma in situ. Carcinoma in situ is a kind of early non-invasive cancer, which usually has a certain obvious boundary with the neighboring normal tissues and is characterized by slow development. Carcinoma in situ is only confined to the skin or mucous membrane and does not break through the basal layer to invade into other tissues, so there is no metastasis, and its malignant degree is relatively small compared with that of metastatic cancer. However, endometrial cancer may not necessarily be caused by carcinoma in situ, but may also be metastatic cancer. Once endometrial cancer is diagnosed, systemic related examination, such as pathologic examination, will also be conducted to determine the type and timely treatment. Generally speaking, most in situ cancers can be cured after surgical removal. If endometrial cancer is suspected, you must consult a doctor in time and follow the doctor’s instructions for examination and treatment.