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)

The authors performed intraperitoneal transposition of the right ureter in a patient who suffered from dilatation of the renal cavity-system due to retroperitoneal fibrosis. One and a half year later an angiomyolipoma was eliminated from the left kidney of the patient. Describing the associated occurrence of these 2 infrequent diseases the authors deal with the problem of etiology, diagnosis and treatment.
 ...
PMID:[A case of retroperitoneal fibrosis associated with renal angiomyolipoma]. 186 39

Renal angiomyolipoma is a rare renal tumor usually associated with tuberous sclerosis, a syndrome characterized by adenoma sebaceum, mental insufficiency and epilepsy. The authors present a rare case of renal angio-myolipoma associated with bilateral double ureter, in a young male patient not affected by tuberous sclerosis. Histologically, the angiomyolipoma is defined by the presence of smooth muscular cells, new formed vessels and fat. Clinical diagnosis requires the utilization of various imaging techniques, like intravenous pyelogram, ultrasonic scan, CT scan, and FNA (Fine Needle Aspiration). In the histopathologic diagnosis of angiomyolipoma the use of immunohistochemical techniques with different antibodies has been helpful, for the necessity to differentiate angiomyolipoma from other epithelial tumors, as renal cell carcinoma and sarcomatous neoplasms. As for as treatment is concerned, the indication for surgery is still maintained by two factors not affected by these diagnostic improvements: tumor size and presence of symptoms. Tumor size is an important predictive growth factor of the tumor. In the absence of symptoms a close follow-up with ultrasonographic scan may be indicated, keeping in mind the possible presence of a synchronous renal cell carcinoma. Hemorrhage can be a fatal complication of renal angiomyolipoma, requiring emergency surgery or embolization.
 ...
PMID:[Renal angiolipoma associated with bilateral double ureter. A clinical case]. 919

Cases are presented to illustrate pitfalls in radiologic and histopathologic diagnosis in urology. In a 73-year-old woman, ultrasound revealed calcification in an irregular mass arising from the left wall of the bladder. Bladder biopsy reported the mass as papillary transitional cell carcinoma. Histologically, the specimen showed marked hyperplasia of the urothelium with formation of Brunn's nests and no evidence of dysplasia or malignancy. A review of medical images showed that the mass was a calcified uterine fibroid. In a 36-year-old man, a calcified opacity in the pelvis was reported as a ureteric calculus, and the patient underwent ureteroscopy. No stone was found. A review of an intravenous urogram showed that the radio-opaque shadow appeared outside the left ureter. A 41-year-old man with tetraplegia developed hydronephrosis as the result of a calculus in the renal pelvis. Ureteric stenting was performed, followed by shock wave lithotripsy. A follow-up x-ray of the abdomen showed a small radioopacity that projected over the line of the left ureter at the L-3 level-probably a ureteric calculus. A review of a computed tomography scan revealed that the calculus, noted on plain film at the level of L-3, had become extruded and was lying posterior to the ureter. A 59-year-old man underwent nephrectomy for a 5-cm solid lesion in the mid pole of the left kidney. Histology showed multiple synchronous renal cell carcinomas and angiomyolipomas. The patient underwent further investigation for von Hippel-Lindau disease and tuberous sclerosis. A review of tissue blocks from the nephrectomy specimen, however, showed no evidence of angiomyolipoma. What was interpreted as renal angiomyolipoma was actually simple distorted blood vessels in areas of renal scarring. To prevent mistakes in diagnosis and to detect medical errors without delay, the authors recommend that physicians set aside time to reflect upon their clinical practice, regularly participate in honest and informal case discussions, and seek a second opinion when in doubt.
 ...
PMID:Pitfalls in radiologic and histopathologic diagnosis of urologic disease--report of 4 cases. 1727 70

Magnetic resonance (MR) imaging is useful in the characterization of renal masses. The MR imaging manifestations and pathologic diagnoses of 82 renal masses were reviewed and correlated. The MR imaging appearance of clear cell type renal cell carcinoma varies depending on the presence of cystic components, hemorrhage, and necrosis. Papillary renal cell carcinomas appear as well-encapsulated masses with homogeneous low signal intensity on T2-weighted images and homogeneous low-level enhancement after the intravenous administration of contrast material, or as cystic hemorrhagic masses with peripheral enhancing papillary projections. Transitional cell carcinoma may be seen as an irregular, enhancing filling defect in the pelvicaliceal system or ureter. Lymphomatous masses are usually hypointense relative to the renal cortex on T2-weighted images and enhance minimally on delayed gadolinium-enhanced images. Bulk fat is a distinguishing feature of angiomyolipoma. Oncocytoma has a variable and nonspecific appearance at MR imaging. MR imaging findings may allow the characterization of various renal masses and can provide valuable information for their clinical management.
 ...
PMID:MR imaging of renal masses: correlation with findings at surgery and pathologic analysis. 1863 25

A 63-year-old lady, presented to us with nonspecific abdominal pain. Ultrasonography (USG) and CT scan abdomen and pelvis, showed right moderate hydronephrosis, with no evidence of mass at pelvi-ureteric junction (PUJ) obstruction. Per-operatively mass upper ureter was found obstructing PUJ. Mass was excised and pyeloplasty done, with Double J (DJ) Stenting. Stent was removed after a week. Histopathology of specimen showed upper ureteric Angiomyolipoma.
 ...
PMID:URETERIC ANGIOMYOLIPOMA CAUSING UNILATERAL PELVI-URETERIC JUNCTION OBSTRUCTION. 2618 85

A 47-year-old man was admitted for preventive embolisation of a 10 cm angiomyolipoma (AML) of the right kidney. Three weeks after embolisation, he was readmitted at the emergency unit for a right renal colic. The CT scan confirmed the obstruction of the right ureter due to the presence of fatty tissue into the lumen. Understanding fatty tissue migration into the collecting system is not simple. We hypothesised that the use of alcohol during the embolisation procedure could have led to focal necrosis of the collecting system, thus enabling migration of fatty tissue into the renal calyces.
 ...
PMID:Renal colic due to fatty tissue obstruction of the ureter following selective arterial embolisation of a 10 cm angiomyolipoma. 2622 60

Erosion of surgical materials into the adjacent organs following surgical procedures is a rare complication. Migrations of these surgical materials into the urinary tract like pelvicalyceal system, ureter and bladder have been reported following various urological procedures. We present a case of migrated Hem-o-Lok clips into the ureter following a laparoscopic partial nephrectomy for angiomyolipoma of the left kidney presented with recurrent urinary tract infection. The case was managed with ureteroscopic removal of clips. The patient is asymptomatic on last follow-up.
 ...
PMID:Migrated Hem-o-Lok clips in the ureter: a rare cause of recurrent urinary tract infection. 2820 87

Upper urinary surgery is an important area of urology surgery. Open surgery used to be the gold standard of upper urinary surgery. With the development of medical techniques, minimal invasive surgeries including laparoscopic and robot assisted-laparoscopic surgery have gradually replaced the open surgery. Because of the complexity and diversity of upper urinary diseases, surgeries sometimes are difficult, and minimal invasive surgeries require higher surgical abilities of urologists than open surgeries. In recent years, depending on our surgical experience and international reports, our team from three Chinese medical centers summarizes techniques of upper urinary minimal invasive surgeries. For malignant diseases, such as renal and ureteral carcinomas, it's important to totally remove the tumor first, and then to avoid the surgical injuries. We summarize surgical experience of retroperitoneal laparoscopic partial nephrectomy for moderately complex renal hilar tumors. Our team modified minimal invasive techniques for some complex tumors, including ring suture technique for renal hilar tumors, internal suspension technique for renal ventral tumors, and combination retroperitoneal laparoscopic surgery with mini-flank incision for complex renal tumors. While for begin diseases, urologists should focus on the resections and surgical injuries at the same time. We have reported the novel technique of laparoscopic aspiration for central renal angiomyolipoma, making the surgery simple and available. For reconstruction surgeries, operations should be based on several principals. We generalize it as "4TB principals", which include "tension-free", "water-tight", "thin suture", "no touch of the key area" and "protecting the blood supply". Depending on the localization, length, and etiology of the strictures, different techniques are required. Our team summarize the pyeloplasty, ureteral reimplantation and ileal ureter replacement based on our surgical experience. For infant upper urinary surgeries, our team has made invasive surgeries that can be used in complex diseases, such as duplex kidney. Based on years of surgical techniques, our modified surgeries achieve a better subjective cosmetic result than the traditional surgeries. In the future, the standardized, practical, simple and individual minimal invasive surgical technique will become the main direction in the future researches.
 ...
PMID:[Review of upper urinary modified minimal invasive surgical technology]. 3142 Jun 9