B, Storiform fibrosis within periureteral
tissue in a case of IgG4-related retroperitoneal fibrosis.
The rare intrinsic ureteral involvement occurs when ectopic endometriosis tissue is present in the mucosal or muscular layer of ureters, from deep infiltrating periureteral
lesion or, hypothetically, from lymphatic or venous metastases (1, 3).
Common etiologies include ureteral calculi, surgical and non-surgical trauma, periureteral
fibrosis, and malignancy.
It is acknowledged that the transplant ureter is highly susceptible for damage due to reduced blood supply, because after explantation from donor, the only source of blood is from the renal pelvic vessels, which run in the periureteral
Stenosed segment was incised posterior-laterally until periureteral
and peripelvic fat was visualized.
extension of the inflammatory disease that has affected the aorta and mere coincidence (the coexistence of idiopathic retroperitoneal fibrosis and an abdominal aneurysm) are the 2 main pathophysiologic mechanisms that have been proposed.
8 cm in diameter containing multiple stones causing dilatation of the ureter proximally with periureteral
Although the pathology is usually extensive in the submucosa, all layers--from the mucous membrane through deep to the perivesical or periureteral
tissues--may be involved.
edema: An increased density of the fat immediately adjacent to the segment of ureter containing the calculus.
1,3,4) Prominent collateral vessels may develop, and the gonadal, ascending lumbar, adrenal, periureteral
, and capsular veins are major potential collateral veins that can develop from left renal vein compression or obstruction.
The presence of periureteral
flare due to the urinary extravasation may be seen occasionally on intravenous urography as well.
When traditional hemostatic techniques fail in delicate anatomic sites, such as the periureteral
area, hemostatic agents are an effective option that can minimize the risk of injury to surrounding vital structures.