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

Computed tomography (CT) is the preferred method for evaluating the left periaortic infrarenal region. Structures larger than 11 mm in cross-sectional diameter in this region are considered abnormal and should be evaluated for lymphadenopathy, hydroureter, or a vascular abnormality such as venous thrombosis or varicoceles. Normal structures include inferior mesenteric vessels, left gonadal vein and artery, and ureter. The diagnostic process may be complicated by variations in anatomy, including double inferior vena cava, left inferior vena cava, retroaortic left renal vein, circumaortic left renal vein, horseshoe kidney, crossed-fused renal ectopia, renal agenesis, and ureteral duplication. Familiarity with the anatomy of this region and awareness of normal variants are necessary to avoid errors in diagnosis. Radiologists should also be aware of problems in CT technique (nonopacified bowel, dynamic and unenhanced scanning) that can confuse the diagnosis.
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PMID:Left infrarenal region: anatomic variants, pathologic conditions, and diagnostic pitfalls. 173 73

To determine the frequency and distribution of extrahepatic and extraskeletal metastases in patients with breast carcinoma, the abdominal CT scans of 260 consecutive patients were systematically evaluated. Extrahepatic and extraskeletal metastases were demonstrated in 26 patients (10%). Confirmation of findings was made by biopsy, autopsy, or by demonstration of progression or regression of disease. Twelve patients (4.6%) demonstrated metastases to the stomach, eleven of whom presented with a linitis plastica pattern. Retroperitoneal and/or mesenteric adenopathy was noted in 10 patients (3.8%), of whom three demonstrated associated hydronephrosis and one demonstrated associated biliary obstruction. Ascites was seen in 14 (5.4%) and peritoneal carcinomatosis in 7 (2.6%). Genitourinary involvement included metastases to the kidney (one case), ureter (one), and uterus (one). Direct invasion of the diaphragm by adjacent pleural metastases (two cases) as well as a soft tissue metastasis (one case) was also demonstrated. Metastases to the ovaries, adrenals, or pancreas could not be identified. Although lesions to the liver and skeleton account for the largest group of metastases from breast carcinoma seen in the abdomen, one should be aware of the potential for other locations of metastatic disease.
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PMID:Distribution of metastases in breast carcinoma: CT evaluation of the abdomen. 193 43

The authors review primary and secondary neoplastic lesions of the ureter. Primary ureteral tumors are rare, although when they occur, they usually consist of transitional cell carcinoma. The most frequent symptoms are hematuria, frequency, dysuria, and pain. Secondary ureteral neoplasms are caused by direct extension from an adjacent extraureteral primary tumor or from a site of bulky metastasis and, rarely, by metastasis from a distant primary tumor. The most useful diagnostic modalities are retrograde pyelography for direct visualization of ureteral involvement--particularly in the presence of high-grade obstruction--and computed tomography for evaluation of extraureteral extent of tumors and the presence of lymphadenopathy and distant metastases.
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PMID:Ureteral neoplasms. 218 98

A case of spontaneous urinary peripelvic extravasation secondary to an obstructing squamous cell carcinoma of the ureter is presented. A review of the literature reveals that peripelvic extravasation caused by tumor obstruction of the ureter is rare and most of its underlying lesions are metastatic retroperitoneal adenopathy.
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PMID:Spontaneous peripelvic extravasation due to squamous cell carcinoma of the ureter. 269 94

A patient with a single kidney presented with ureteral obstruction caused by a combination of primary transitional cell carcinoma of the ureter and extrinsic involvement of the ureter by a second primary malignant retroperitoneal lymphadenopathy. Due to the complexity of the case, we chose to perform a partial ureterectomy and used a method of ureteral substitution using the interposed vermiform appendix in combination with a psoas hitch. Application of the psoas hitch may allow the use of the appendix in most cases in which ureteral substitution becomes necessary. Antireflux mechanism is easily achieved with the appendix using the split cuff nipple technique. Finally, the use of the appendix allows complete retroperitonealization of the anastomoses to both ureter and bladder. We anticipate that the appendix will be used more commonly in the future as a ureteral substitute as more urologists become more comfortable with it through its use in various reconstructive procedures.
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PMID:Ureteral substitution using the isolated interposed vermiform appendix in a patient with a single kidney and transitional cell carcinoma of the ureter. 807 62

We report a case of disseminated infection due to Bipolaris australiensis in a 21-year-old immunocompetent Pakistani man. He presented with fever and jaundice. Examination revealed a mass in the right lung, mediastinal lymphadenopathy, a pericardial effusion, and abdominal masses obstructing and invading the common bile duct and right ureter. Histological examination and culture of a biopsy specimen of the hilar mass yielded the fungal pathogen B. australiensis. The patient was treated successfully with amphotericin B and itraconazole.
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PMID:Disseminated infection due to Bipolaris australiensis in a young immunocompetent man: case report and review. 933 30

We present cross-sectional imaging findings in eight patients with ureter tumors. Eight patients were examined by computed tomography (CT), seven by ultrasonography (US), and five by magnetic resonance imaging (MRI). All the lesions were detected by the three modalities. All modalities were accurate in excluding the periureteral invasion and lymphadenopathy in Stages 1 and 2 tumors. While CT and MRI identified the periureteral invasion and lymphadenopathy in four patients with advanced tumors, US failed to show the local invasion in three of four patients. Nevertheless, enlarged retroperitoneal lymph nodes could be detected sonographically in the three Stage 4 tumors. CT and MRI appear to have a high diagnostic sensitivity and staging accuracy in ureter tumors. Although US detects ureter tumors efficiently, this technique seems to be unreliable in showing local invasion in a substantial number of patients.
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PMID:Cross-sectional imaging in ureter tumors: findings and staging accuracy of various modalities. 1167 28

We report a case of a 22 years old type 1 diabetic man with a history of weight loss, weakness, anorexia, fever and recurrent urinary tract infection since February 2001. In April 2001, he presented anuria due to obstructive acute renal failure. Hepatosplenomegaly and lymphadenopathy were absent at physical examination. Laboratory tests revealed a high level of gamma globulin (53.4 g/l) and anaemia (haemoglobin 7.7 g/100 ml) without leukopenia and thrombocytopenia. CT scan showed multiple retroperitoneal lymphadenopathies causing compression of the two ureters, hydro-ureter associated with hydronephrosis, hepatosplenomegaly and multiple pulmonary nodes. Lymphadenopathies, anaemia, high level of gamma globulin, high titres of anti-leishmanial antibodies and the excellent outcome after treatment with meglumine antimoniate (Glucantime) confirmed visceral leishmaniasis. This report documented an unusual clinical presentation of Visceral leishmaniasis in a diabetic patient.
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PMID:[Obstructive acute renal failure revealing visceral leishmaniasis in a diabetic patient]. 1272 15

Primary small cell carcinoma of the ureter is very rare. We report a case associated with SIADH (syndrome of inappropriate secretion of ADH) -like symptoms. A 53-year-old man presented to our hospital with lower back and left lower quadrant abdominal pain. Computed tomography revealed left hydronephrosis, a peri-ureteral left lower quadrant mass, and retroperitoneal (RP) lymphadenopathy. Transduodendal biopsy of a RP lymph node revealed small cell carcinoma. He was referred to urology for further evaluation. Urography showed an obstructing mass invading the left ureter. Comprehensive metastatic evaluation revealed no other lesions. Thus, we diagnosed primary small cell carcinoma of the ureter with RP lymph node metastases. In addition, he developed SIADH-like symptoms, and we strongly suspected that it was due to ectopic production of ADH from this carcinoma. He was treated with systemic chemotherapy (methotrexate, epirubicin, and cisplatin). Following this, we performed radical nephroureterectomy with RP lymph node resection. However, he died of recurrent disease five months later.
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PMID:[A case of small cell carcinoma of the ureter with SIADH-like symptoms]. 1535 20

Renal cell carcinoma (RCC) in children and young adults is rare and pathologically problematic. RCC can be either hereditary or sporadic and has a guarded prognosis because appropriate management has not been established. A case of RCC in an 11-year-old is reported. The clinical presentation was a right abdominal mass, hematuria, urinary tract infection, and wasting. Radio-logically, the mass was found within the right kidney with calcification and paraaortic lymphadenopathy. The postsurgical diagnosis was Wilms' tumor stage T4N2M0. On gross inspection, the tumor was ill defined, extending across Gerota's fascia and into the ureter lumina. Microscopically, the tumor consisted of malignant epithelial cells with clear and eosinophilic cytoplasm in nested, papillary, and alveolar configuration. Hyaline nodules, psammoma bodies, vascular invasion, capsular invasion, and extension into the ureter were also found. Immunohistochemically, the cells showed strong nuclear immunoreactivity for TFE3. We concluded that this case was an RCC associated with Xp11.2 translocation/TFE3 fusion, Fuhrman grade 3, stage IV.
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PMID:Pediatric renal cell carcinoma associated with Xp11.2 translocation/TFE3 gene fusion. 1820 90


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