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Query: UMLS:C0403608 (ureter)
 9,655 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Patients with chronic renal failure and total diversion of the lower urinary tract have been considered poor transplant candidates, and post-transplant urinary diversion, i.e., Bricker loop, has been thought to be necessary. Our experience with nine patients clearly indicates that these patients are actually excellent transplant candidates and that post-transplant urinary diversion rarely is necessary. Ureteroneocystostomy of the allografted ureter was performed in seven patients with pretransplant total urinary diversion and all have completely normal bladder and renal function 10 to 66 months after transplantation; the two patients with Bricker loop procedures performed at transplantation died 7 months after transplantation of rejection and pancreatitis. The excellent results achieved with ureteroneocystostomy are attributed to (1) errors in diagnosis resulting in inappropriate bladder or ureteric surgery early in the course of the patient's disease; (2) confusion of immunologic of functional disorders with anatomic problems; (3) growth and development of the bladder, and (4) complete control of chronic bladder infection by pretransplant nephrectomy, ureterectomy, and antibiotics.
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PMID:Renal transplantation in patients with urinary tract abnormalities. 76 10

High-grade reflux commonly lasts longer than moderate reflux, which disappears with maturation of the ureterovesical junction. It is known that ureteral function is affected by urinary tract infection from studies in experimental animals, as well as through clinical findings in patients with upper tract infection. Whether infection might affect the ability of the ureter to prolong high-grade reflux was questioned. This observation might explain why high-grade reflux does not disappear as rapidly as moderate reflux in children with recurrent urinary tract infections. Vesicoureteral reflux was produced surgically in combination with bladder neck obstruction using infant monkeys. The reflux thus produced was high grade with ureteral dilation and caliectasis. In the group of animals in which the bladder neck obstruction was relieved surgically, the reflux rapidly disappeared. In the other group, a bladder infection was produced with Escherichia coli at the time of release of the bladder neck obstruction. The reflux lasted significantly longer, an average of 18 months. Therefore, it appears that treatment of urinary tract infection rather than vesicoureteral reflux is the most important therapy.
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PMID:Vesicoureteral reflux in the primate. IV. Infection as cause of prolonged high-grade reflux. 328 60

Although the vast majority of bladder tumors are epithelial neoplasms, a variety of nonneoplastic disorders can cause either focal bladder masses or diffuse mural thickening and mimic malignancy. Some of these entities are rare and poorly understood such as inflammatory pseudotumor, which produces ulcerated, bleeding polypoid bladder masses. These masses may be large and have an extravesical component. Bladder endometriosis manifests as submucosal masses with characteristic magnetic resonance imaging features consisting of hemorrhagic foci and reactive fibrosis. Nephrogenic adenoma has no typical features, and pathologic evaluation is required for diagnosis. Although imaging features of malacoplakia are also nonspecific, characteristic Michaelis-Gutmann bodies are found at pathologic evaluation. The various types of cystitis (cystitis cystica, cystitis glandularis, and eosinophilic cystitis) require pathologic diagnosis. Bladder infection with tuberculosis and schistosomiasis produces nonspecific bladder wall thickening and ulceration in the acute phase and should be suspected in patients who are immunocompromised or from countries where these infections are common. The diagnosis of chemotherapy cystitis and radiation cystitis should be clinically evident, but imaging may be used to determine severity and to assess complications. Extrinsic inflammatory diseases such as Crohn disease and diverticulitis may be associated with fistulas to the bladder and focal bladder wall abnormality. The extravesical findings allow the diagnosis to be made easily. Finally, extrinsic masses arising from the prostate or distal ureter may cause filling defects, which can be confused with intrinsic bladder masses.
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PMID:From the archives of the AFIP: Inflammatory and nonneoplastic bladder masses: radiologic-pathologic correlation. 1710 55