Stage 0 bladder cancer; drawing shows the bladder, ureter, prostate, and urethra. First inset shows papillary carcinoma on the inner lining of the bladder. Second inset shows carcinoma in situ on the inner lining of the bladder. Also shown are the layers of connective tissue and muscle tissue of the bladder and the layer of fat around the bladder.
Stage 0 bladder cancer. Abnormal cells are found in the tissue lining the inside of the bladder. Stage 0a may look like tiny mushrooms growing from the lining of the bladder. Stage 0is is a flat tumor on the tissue lining the inside of the bladder.