You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which one of the following tumours involving the female genital tract has the WORST prognosis? and explain in detail?
Serous cystadenocarcinoma of the ovary in' a 45-year-old, Around 75% of serous cystadenocarcinoma of the ovary are in an advanced stage at the time of diagnosis. These tumours have a worse prognosis than any of the other tumours listed.