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

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.
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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.
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PMID:Pitfalls in radiologic and histopathologic diagnosis of urologic disease--report of 4 cases. 1727 70

Ureteral endoprosthesis results are presented for 22 patients (9 males and 13 females) with long strictures of the upper urinary tract (UUT). Stenosis was caused by rectal tumor in 2 patients, by cancer of the uterine cervix in 5 patients. In a female with Burneville-Pringle disease metallic prosthesis was set in the pyeloureteral segment (PUS) of the solitary right kidney. Six patients had long strictures of the abdominal part of the ureter, 4 had PUS strictures, 3--of the ureter of the transplanted kidney and 1 had stricture of ureterocalicoanastomosis after Neivert operation. Endoprosthesis was established by a retrograde approach in 13 cases, via percutaneous antegrade approach--in 9 cases. In postoperative period 2 patients had exacerbation of chronic pyelonephritis, they received anti-inflammatory treatment. Patancy of the ureter was reestablished in all the cases and persisted for all the follow-up period (4-62 months). Late after operation a patients with Burneville-Pringle disease developed UUT obstruction because of ureteral compression by enlarged angiolipomatous nodes under endoprosthesis. Therefore, one more nitinol stent was set in the upper third of the right ureter retrogradely. Thus, ureteral endoprosthesis in long and recurrent strictures of the ureter, ineffective plastic surgery on the UUT is an operation of choice.
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PMID:[Long-term results of ureteral endoprosthesis with nitinol stents]. 1982 81