Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0403608 (ureter)
 9,655 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

We conducted 8200 transurethral ureteropyeloscopies (UPS) including transurethral contact ureterolithotripsies (CULT) in pregnant women using semirigid ureteroscopes, pneumatic lithotriptors. Basing on the experience gained we performed 66 UPS and CULT in pregnant women with suspected symptomatic ureterolithiasis: 16 (24.2% in trimester I, 32 (48.4% 0 in trimester II, 18 (27.3%)--in trimester III. Ureteral stones were detected in 37 patients. Interventions were performed without accompanying x-ray examination. Fragmentation of the stones was made in 34 cases. In 3 cases the stone migrated into renal cavity. No stones were found in 27 cases. Stent was not inserted after fragmentation in ureterolith location in the lower third of the ureter. Complications in pregnancy in early postoperative period were not seen. UPS and CULT were highly informative, effective and safe methods of examination and treatment of pregnant patients with suspected symptomatic ureterolithiasis.
 ...
PMID:[Ureteropyeloscopy and contact ureterolithotripsy in pregnancy]. 1905 97

Ureteritis cystica is characterized by formation of multiple cysts in the wall of the renal pelvis or ureter. The clinical course is usually slow, but manifests if the cysts cause infection or obstruction. Stones are further complication to the disease. In this case study, we present a 39-year-old male originally referred with renal colic and misdiagnosed as ureterolithiasis due to the calcifiying cysts.
 ...
PMID:A case of calcified ureteritis cystica: an indiscernible condition from ureterolithiasis. 1965 1

We report a case of a 32-year-old man, who presented to the emergency department with severe abdominal pain, with radiation to his back. An ultrasound examination revealed mild hydronephrosis bilaterally. A non-enhanced computer tomography was then performed and showed a 9 mm hyperdense image in the left ureter topography along together with an 8-mm hyperdense image in the right ureter topography, allowing us to establish the diagnosis of bilateral ureterolithiasis. The patient was taken to the operating room in order to perform ureteroscopy for endoscopic removal of the stones.
 ...
PMID:Acute onset of renal colic from bilateral ureterolithiasis: a case report. 1982 94

In 2002, speedy elimination of ureterolithiasis in the lower part of ureter was first reported with the alpha 1 blocker. Thereafter, there are a lot of reports including meta-analysis about tamsulosin. In 2011 EAU Guidelines on Urolithiasis, it is the most important to establish effective MET (medical expulsive therapy) to facilitate spontaneous stone passage. Alpha 1 blockers are the preferred agents for MET. As a basic evidence for MET, we reported that alpha 1a and 1d AR subtype mRNA was highly expressed in the human ureter and that alpha 1A AR is the main participant in the human ureteral contraction. It is published newly in Japanese Guidelines on Urolithiasis revised edition to schedule to be published soon.
 ...
PMID:[Medical expulsive therapy facilitated by alpha 1 adrenoceptor antagonist]. 2196 Feb 38

Retrocaval ureter is a rare cause of hydronephrosis. Its rarity and non-specific presentation pose a challenge to surgeons and radiologists in making the correct diagnosis. Differentiation from other causes of urinary tract obstruction, especially the more common urolithiasis, is important for successful surgical management. Current practice has seen multislice computed tomography (MSCT) rapidly replaces intravenous urography (IVU) in the assessment of patients with hydronephrosis due to suspected urolithiasis, especially ureterolithiasis. However, MSCT, without adequate opacification of the entire ureter, may allow the physician to overlook a retrocaval ureter as the cause of hydronephrosis. High-resolution IVU images can demonstrate the typical appearance that leads to the accurate diagnosis of a retrocaval ureter. We reported a case that illustrates this scenario and highlights the importance of IVU in the assessment of a complex congenital disorder involving the urinary tract.
 ...
PMID:Retrocaval ureter: the importance of intravenous urography. 2258 77

Unenhanced helical computed tomography (UHCT) has evolved into a well-accepted diagnostic method in patients with suspected ureterolithiasis. UHCT not only shows stones within the lumen of the ureter, it also permits evaluation of the secondary signs associated with ureteral obstruction from stones. However, there we could find no data on how secondary signs might differ in relation to different compositions of ureteral stones. In this study, we compared the degree of secondary signs revealed by UHCT in uric acid stone formers and in patients forming calcium stones. We enrolled 117 patients with ureteral stones who underwent UHCT examination and Fourier transform infra-red analysis of stone samples. Clinical data were collected as follows: age, sex, estimated glomerular filtration rate (eGFR), urine pH, and radiological data on secondary signs apparent on UHCT. The uric acid stone formers had significantly lower urine pH and eGFR in comparison to calcium stone formers, and on UHCT they also had a higher percentage of the secondary signs, including rim sign (78.9% vs. 60.2%), hydroureter (94.7% vs. 89.8%), perirenal stranding (84.2% vs. 59.2%) and kidney density difference (73.7% vs. 50.0%). The radiological difference was statistically significant for perirenal stranding (p=0.041). In conclusion, we found that UHCT scanning reveals secondary signs to be more frequent in patients with uric acid ureteral stones than in patients with calcium stones, a tendency that might result from an acidic urine environment.
 ...
PMID:Comparison of secondary signs as shown by unenhanced helical computed tomography in patients with uric acid or calcium ureteral stones. 2438 59

Urinary tract calculi and infections are common causes of presentation to the emergency department. Computed tomography kidney-ureter-bladder is the initial imaging study of choice in patients presenting with symptoms of urinary tract calculi. As clinical evidence of superimposed infection can be atypical or absent, it is crucial to identify subtle imaging findings that suggest this complication. We report here a case of acute ureterolithiasis with missed evidence of superimposed infection on the initial computed tomography kidney-ureter-bladder. The patient subsequently developed urosepsis complicated by critical limb ischemia requiring amputation of all 4 extremities. The case became the topic of a malpractice suit.
 ...
PMID:The impacted ureteral stone. 2290 55

An osmotic diuresis phenomenon appearing in renal colic during urography was refered. The pressures occurent in renal pelvis during obstruction of ureter and normal conditions were described. The pressure surge patomechanism in renal collecting system as a cause of renal rupture and retroperitoneal extravasation of urine was discussed. Another causes of extravasation of urine were mentioned. Case description. The patient case with ureterolithiasis (stone placed in ureteric orifice) complicated with spontaneous pelvic rupture. The extravasation of urine and ureterolithiasis were confirmed by ultrasonography and urography. Temporary nephrostomy and antibiotic therapy were performed. The stone underwent spontaneous passage. Absence of characteristic symptoms of urine extravasation makes the diagnosis difficult, requiring additional imaging studys. Proper differentiation of real urine extravasation from diffusion through the renal parenchyma to the perirenal area due to osmotic diuresis is important part of diagnosis. Elevated inflammatory parameters and infection of urinary tract often coexist with peripelvic extravasation. Ureterolithiasis complicated by urinary tract infection requires renal drainage and antibiotic therapy as a first-line treatment. Either nephrostomy or antibiotic therapy are successful treatment of urine extravasation.
 ...
PMID:[Efficiency of imaging methods (urography, CT contrast-enhanced) in acute stage of ureterolithiasis-interpretation problems based on description case and bibliography review]. 2405 80

OBJECTIVE--To evaluate the technical, short-term, and long-term outcomes in cats with benign ureteral obstructions treated by means of double-pigtail ureteral stent placement. DESIGN--Retrospective case series. ANIMALS--69 cats (79 ureters). PROCEDURES--The diagnosis of benign ureteral obstruction was made via abdominal ultrasonography, radiography, and ureteropyelography. Ureteral stent placement was attempted endoscopically, surgically, or both, with fluoroscopic guidance. The medical records were reviewed for pre-, intra-, and postoperative data; complications; and outcome. RESULTS--69 cats (79 ureters) had stent placement attempted for various causes: ureterolithiasis (56/79 [71%]), stricture (10/79 [13%]), both ureterolithiasis and stricture (12/79 [15%]), or a purulent plug (1/79 [1%]). Stent placement was successful in 75 of 79 ureters (95%). Median number of stones per ureter was 4 (range, 0 to > 50), and 67 of 79 (85%) had concurrent nephrolithiasis. Preoperative azotemia was present in 95% (66/69) of cats (median creatinine concentration, 5.3 mg/dL [range, 1.1 to 25.8 mg/dL]), and 71% (49/69) remained azotemic (median, 2.1 mg/dL [range, 1.0 to 11.8 mg/dL]) after successful surgery. Procedure-related, postoperative (< 7 days), short-term (7 to 30 days), and long-term (> 30 days) complications occurred in 8.7% (6/69; 7/79 ureters), 9.1% (6/66), 9.8% (6/61), and 33% (20/60) of cats, respectively; most of these complications were minor and associated with intermittent dysuria or the need for ureteral stent exchange. The perioperative mortality rate was 7.5% (5/69), and no deaths were procedure related. The median survival time was 498 days (range, 2 to > 1,278 days). For patients with a renal cause of death, median survival time was > 1,262 days, with only 14 of 66 cats (21%) dying of chronic kidney disease. Nineteen (27%) cats needed a stent exchange (stricture in-growth [n = 10], migration [4], ureteritis [2], dysuria [2], pyelonephritis [1], or reflux [1]). No patient died of the procedure or recurrent ureteral obstruction. CONCLUSIONS AND CLINICAL RELEVANCE--Results of the present study indicated that ureteral stenting is an effective treatment for benign ureteral obstructions in cats regardless of obstructive location, cause, or stone number. The perioperative morbidity and mortality rates were lower than those reported with traditional ureteral surgery. The short- and long-term complications were typically minor but may necessitate stent exchange or use of an alternative device, particularly with ureteral strictures. The prognosis for feline ureteral obstructions after ureteral stenting could be considered good when the procedure is performed by trained specialists.
 ...
PMID:Technical and clinical outcomes of ureteral stenting in cats with benign ureteral obstruction: 69 cases (2006-2010). 2454 31

The differential diagnosis of right lower quadrant abdominal pain includes both ureterolithiasis and acute appendicitis. Surgical treatment can be undergone without confirmatory imaging studies after a clinical diagnosis is made. For this reason, an occult, second abdominal process may be present. A 47-year-old male presented with a three-day history of acute right lower quadrant abdominal pain. A contrast CT revealed both a 6 mm calculus obstructing the right ureter and acute appendicitis. The patient underwent appendectomy and ureteroscopy with stent placement at the same time. Simultaneous appendicitis and ureterolithiasis may present with similar clinical findings. Due to the potential risks associated with missing either diagnosis, imaging studies may be an appropriate as a step in the management of the patient with right lower quadrant pain.
...
PMID:Synchronous obstructive ureterolithiasis and acute appendicitis. 2496 Aug 2


<< Previous 1 2 3 4 Next >>