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

Kidney stone imaging is an important diagnostic tool and initial step in deciding which therapeutic options to use for the management of kidney stones. Guidelines provided by the American College of Radiology, American Urological Association, and European Association of Urology differ regarding the optimal initial imaging modality to use to evaluate patients with suspected obstructive nephrolithiasis. Noncontrast CT of the abdomen and pelvis consistently provides the most accurate diagnosis but also exposes patients to ionizing radiation. Traditionally, ultrasonography has a lower sensitivity and specificity than CT, but does not require use of radiation. However, when these imaging modalities were compared in a randomized controlled trial they were found to have equivalent diagnostic accuracy within the emergency department. Both modalities have advantages and disadvantages. Kidney, ureter, bladder (KUB) plain film radiography is most helpful in evaluating for interval stone growth in patients with known stone disease, and is less useful in the setting of acute stones. MRI provides the possibility of 3D imaging without exposure to radiation, but it is costly and currently stones are difficult to visualize. Further developments are expected to enhance each imaging modality for the evaluation and treatment of kidney stones in the near future. A proposed algorithm for imaging patients with acute stones in light of the current guidelines and a randomized controlled trial could aid clinicians.
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PMID:An overview of kidney stone imaging techniques. 2757 40

A 30-year-old immunocompetent female presented with right flank pain since 3 years. MRI revealed a large well-defined T1 and T2 hypointense mildly enhancing lesion in the right anterior pararenal space displacing the right kidney and encasing the right ureter with T2 hyperintense wall thickening of the left renal pelvis and ureter. A provisional diagnosis of solitary fibrous tumour was kept. Bilateral double J stenting was done for hydronephrosis. Surgical debulking of the lesion was done with biopsy from the left periureteral wall thickening and was found to be myelolipoma on histopathological examination. This case is a novel variety of myelolipoma which is lipid poor, extra-adrenal and in bilateral perirenal and periureteric location.
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PMID:A rare case of extra-adrenal bilateral perirenal and periureteric myelolipoma. 2899 61

Stress urinary incontinence (SUI) is a common problem in women. Successful treatment is now mid urethral sling but it would be a cause of urethral obstruction. In this case report, a 50 years old woman presented with a huge introitus mass after 3 months of midurethral sling. The mass protruded from the urethra and could not be reduced. Emergency MRI of pelvis was demonstrated prolapsed ureterocele, single system of right ureter. Preoperative planning was cystoscopy and mass excision. The patient was preoperatively counseled that right ureteric reimplantation may be required. Finally, the mass could be excised externally without reimplantation.
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PMID:Incarcerated prolapsed ureterocele after midurethral sling in women. 2920 62

Ureteropelvic junction obstruction (UPJO) with giant hydronephrosis is relatively rare in adults as compared to children. Most of the UPJO reported or seen in daily practice have a distinct hydronephrosis with a narrow ureteropelvic junction and a collapsed ureter distally. We present images a case of an adult female with Left UPJO, which on MRI mimicked an 'elephant head'.
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PMID:Ureteropelvic junction obstruction - mimicking an "elephant head" on magnetic resonance imaging. 2934 21

Xanthogranulomatous pyelonephritis (XGP) is an unusual form of chronic pyelonephritis in which the renal parenchyma is destroyed and replaced by lipid-laden foamy macrophages. It usually affects middle-aged women with a history of recurrent urinary tract infection, diabetes, or kidney stones. The inflammatory process is usually diffuse and can extend beyond the kidney. The rare focal forms may simulate primary renal tumours. The preoperative imaging diagnosis may be difficult. We reported five cases of XGP, The findings of ours were recorded including kidney size, shape, contour, the echogenecity of the renal parenchyma, the internal echoes of the dilate collecting system, the presence of perinephric fluid accumulation and obstruction. One of the 5 cases was a male patient, and the other four were female, with a mean age of 53 years. He affected kidneys of the 5 cases swelled in different degrees, and one of them was found with line-like anechoic fluid. Among the 5 cases, one kidney appeared as diffusely reducing of the parenchyma echogenicity, multiple hypoechoic areas, disappearance of corticomedullary differentiation and multiple hyperecho with shadow. A round cystic anechoic lesion was found in one kidney, with internal punctate echo and peripheral fluid. Ultrasonographic finding of 1 case was extremely hypoechoic lesion on the left kidney, protruding from the outline of the kidney, with the partial renal capsule discontinuous, the less clear boundary, and a little blood flow in it. Ultrasonographic demonstration of 2 cases was mild dilatation of the collecting system with irregular wall thickening and internal hypoechogenicity, and 1 case was solid lesion with less clear boundary to the pelvic wall and a small amount of blood flow signal, the another 1 case was showed floccule without internal blood flow. Three cases were caused by chronic obstruction verified by operation, of which one was staghorn calculi, one was poorly differentiated squamous cell carcinoma in the middle part of the ureter, and one was inflammatory stricture of upper ureteral. Through analysis of the above five cases and review of related literature, we explored diagnoses and management of the patients with XGP. Xanthogranulomatous pyelonephritis (XGP) is a rare chronic variant of pyelonephritis characterized by destruction of the renal parenchyma. Combining ultrasonographic features of XGP with clinical recurrent urinary infection and chronic obstruction, XGP can be included in the differentiation. The diagnosis of XGP suspected by ultrasound can be clarified by CT, MRI, contrast-enhanced ultrasound.
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PMID:[Xanthogranulonatous pyelonephritis: report of 5 cases]. 3012 83

Background: Seminal vesicle cyst is an extremely rare condition, which is frequently congenital and associated with Zinner's syndrome. This syndrome represents a constellation of seminal vesicle cyst, ipsilateral or contralateral renal agenesis or renal dysplasia, ureteral ectopia, and ejaculatory duct obstruction. We report a young symptomatic patient undergoing robot-assisted laparoscopic excision of a huge seminal vesicle cyst during which an atrophic ipsilateral kidney was discovered incidentally and managed by nephroureterectomy in the same session without changing trocar positions. Case Presentation: A 23-year-old male patient presented with a 2-year history of lower urinary tract symptoms, perineal pain, and recurrent urinary tract infections. Ultrasonography revealed the absence of left kidney and a fluid-filled cystic lesion located behind the bladder on the left side, which was consistent with cystic dilatation of the left seminal vesicle. MRI confirmed the diagnosis of a huge cystic structure originating from the left seminal vesicle and identified the presence of a rudimentary left ureter without an associated renal unit. Cystoscopy revealed bulging of the bladder neck at 6 o'clock position and the ureteral orifices at normal positions and configurations. Based on these findings, the clinical diagnosis was established as Zinner's syndrome. The present case was performed by Da Vinci Si robotic platform using the 5-trocar technique. Conclusion: Robot-assisted laparoscopic excision is a safe and feasible option to treat large seminal vesicle cysts, which may be a component of Zinner's syndrome. Simultaneous upper urinary tract interventions, such as nephroureterectomy, can be employed by redocking the robot and repositioning the patient, using the same layout of robotic trocars.
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PMID:Minimally Invasive Management of Zinner's Syndrome with Same-Session Robot-Assisted Seminal Vesiculectomy and Ipsilateral Nephroureterectomy Using a Single Geometry of Trocars. 3041 Sep 97

Background: Fibroepithelial polyps of the urothelial system are rare and are considered to be benign tumors. Ultrasonography (USG), contrast-enhanced CT, and contrast-enhanced MRI can be used for detecting fibroepithelial polyps in the urothelial system. These polyps can be treated by performing open exploration and endoscopic or laparoscopic resection. Previous studies have also reported the frequent use of laser treatment for treating fibroepithelial polyps located in the proximal ureter. Case Presentation: A 54-year-old female patient presented to our clinic with right flank pain. Evaluation of the patient by performing USG and CT detected grade-2 hydronephrosis of the right kidney; however, no stone was detected in the urinary system. MRI detected thickening of the wall of the right proximal ureter along with contrast enhancement. These findings suggested the presence of a ureteral polyp. Ureterorenoscopy detected a 7-cm-long ureteral polyp in the proximal ureter, which was resected by performing monopolar cautery. Conclusion: Although fibroepithelial polyps of the urinary tract are rare, they should be considered in the absence of urinary calculi and in the presence of a ureteral obstruction. Furthermore, careful endoscopic resection by performing electrocautery is a safe and useful method for treating ureteral lesions.
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PMID:Fibroepithelial Polyp of the Ureter: A Rare Cause of Hydronephrosis. 3042 76

Aggressive angiomyxoma is a rare mesenchymal tumor. To discuss the clinicopathological characteristics, treatment and prognosis of aggressive angiomyxoma, four cases of aggressive angiomyxoma of soft tissue in abdominopelvic cavity were collected from January 2015 to August 2017 in Peking University International Hospital. The clinical data, imaging examination, histopathological features, immunophenotype, therapy and prognosis were analysed. The related literatures were reviewed. All of the patients were adult females, age range from 27 to 49 years and mean 33 years. The clinical complaint was abdominal distention with no definite predisposing factor, or occasional physical-exam finding with no obvious discomfort. Three cases were primary and one case was recurrent. Typical layered or swirled structural sign was presented by CT and MRI scanning of three cases. All tumors located in the pelvic cavity, and attached to the uterus, vagina, rectum, bladder or ureter. One case was involved in the abdominal cavity simultaneously,adhesive to the spine, inferior vena cava and spleen. The gross appearance of tumors was from 5 to 22 cm in maximum diameter. The sectioned surfaces were soft, solid, white or yellow-gray, focally accompanied by edema, mucoid degeneration or cystic change. Microscopic observation showed that tumor cells were short spindle shaped and little atypical, the stroma was loose like edematous mucus or collagen, and the vessels were rich in thin and thick-wall. Partially the vessel wall expressed hyaline degeneration. Also tumors might infiltrate surrounding tissue, such as fat or nerve. The immunohistochemistry results of all cases were estrogen receptor and progesterone receptor diffusely moderate positive, Desmin and smooth muscle actin mostly positive, whereas CD34 expressed only in vessel and S-100 protein, CD117 and Dog1 all negative. All the tumors were complete surgical excision. During follow-up, one case recurred the second time. Our conclusions are the diagnosis of aggressive angiomyxoma is based on pathological morphology supplemented by immunohistochemistry, and the tumor may relapse after surgical resection.
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PMID:[Clinicopathological analysis of aggressive angiomyxoma of soft tissue in abdomino-pelvic cavity]. 3056 89

The article presents the experience of successful surgical treatment of a patient with complete ureteral obliteration after transurethral endoscopic pyelolithotripsy in the left renal pelvis with lithoextraction and stenting. Two months later the patient developed stent obstruction and underwent repeat stenting and insertion of a left nephrostomy tube. After another 1.5 months, he was found to have complete obliteration of the left ureter. Ileal substitution of the left ureter was performed with the formation of a pyelo-ileal anastomosis and antireflux ileo-cysto-anastomosis. Contrast-enhanced MRI-urography performed on the 21st day ascertained the complete patency of the anastomosis. The patient was discharged in a satisfactory condition. At a follow-up examination five months after hospital discharge, the patient was in satisfactory condition with no complaints. Renal ultrasound and MRI showed no signs of obstruction of the ileal autograft.
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PMID:[Complete ileal substitution of the obliterated ureter]. 3076 99

In the article a rare case of structural anomaly of ureter, namely obliteration, in 1-year-old infant is reviewed. The obliteration was located in the distal part of the left ureter. There was urine leakage through dilated and inflamed wall of the ureter towards right gluteal region with a formation of retroperitoneal abscess. A diagnosis was established based on preoperative MRI and intraoperative antegrade pyeloureterography. Extravesical Lich-Gregoir ureterocystoneostomy was successfully performed.
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PMID:[Successful treatment of an infant with a rare anomaly: iliosacral dystopia of the right kidney and obliteration of the left distal ureter]. 3118 26


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