Can you please tell me the mean survival rate for fast spreading cervical and uterine cancer?

Difficult? to answer. Unless you provide details of the stage of this cancer, we can not give you a good answer. Besides knowing the stage it matters where the cancer has spread to and also what treatment is being done and if it is helping or failing. Unless the treatment has been used up, there is no telling how long the patient may live because a good response to treatment or lack of it can change everything!