An 8mm internal diameter of the upper left ureter may be serious.
The ureter is a tube that connects the renal pelvis on the upper side and the bladder on the lower side. The average diameter of the ureter is between 5mm and 7mm, and its main function is to transport urine. The average diameter of the ureter is between 5mm and 7mm, and its main function is to transport urine. The diameter of the left upper ureter, i.e., from the junction of the pelvis to the iliac arteries, is usually around 2mm, and the inner diameter of the ureter at the iliac arteries is usually 3mm.
If the internal diameter of the left upper ureter is 8mm, most of the patients are abnormally dilated, which may be related to ureteral stones, inflammation and other factors. If the so-called upper ureter refers to the middle part of the ureter from the pelvic-ureteral junction to the crossing of the iliac arteries, then an internal diameter of 8mm may be normal and not considered serious if no discomfort is experienced.
Regarding the seriousness of the 8mm internal diameter of the left upper ureter, it is recommended that the patient complete the relevant examinations and ask the specialist to determine whether treatment is needed in light of his or her actual situation.