Bladder cancer staging

Tx Primary tumor cannot be assessed
T0No evidence of residual tumor
TaSuperficial non invasive papillary carcinoma
TisSuperficial flat tumor (carcinoma in situ)
T1Invasion of subepithelial connective tissue (lamina propria)
T2aSuperficial invasion of muscularis mucosa (into inner half)
T2bDeep invasion of muscularis mucosa (into outer half)
T3aMicroscopic perivesical spread
T3bMacroscopic perivesical spread 
T4aInvasion of adjacent organs (prostate, seminal vesicles, uterus or vagina)
T4bInvasion of pelvic side wall or abdominal wall
NxRegional lymph nodes not assessed
N0No lymph node involvement
N1One affected lymph node in true pelvis
N2More than one affected true pelvic lymph node
N3Common iliac lymph node involvement
MxDistant metastasis cannot be assessed
M0No distant metastases
M1Distant metastases