Invasion of the entire wall means that cancer has invaded almost all the thickness of the ureteral wall. If the wall thickness is 1MM, it may have invaded 0.9 mm ..
So it is likely that the cancer tissue has flowed into the bladder along the infiltrated tube wall, or the surrounding abdominal cavity tissue has been stained.
So chemotherapy is necessary.
In addition to bladder perfusion chemotherapy, intraperitoneal perfusion is also needed.
Abdominal distension is certain, because the intestine is close to the ureter and bladder, the peristalsis is slowed down.
Do another abdominal enhanced CT to rule out recurrence.