How fast does bladder cancer grow inside you?

Bladder tumors: Are usually found in middle and older age pateint, presenting with gross or microscopic blood in the urine. Some are 'superficial' not penetrating into muscle, and penetrate later into muscle. Not all progress, but some do. Instilled treatments are used first, but if muscle invasive, bladder removal is treatment of choice.

Depends on grade: In general, the "grade", or the microscopic features, of bladder cancer will define the rate of growth. High grade cancers grow more quickly than low grade cancers, and are associated with more advanced (high "stage") types of cancer and poorer outcomes compared to low grade cancers which are generally low "stage". However, high grade cancer caught early is treatable and potentially curable.