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

Investigations of ureter perfusion in cattle during fetal and neonatal period were carried out on 84 fetuses and 10 female newborn cattle. The fetuses 78-1000 mm long were of the 9th-40th week of pregnancy, whereas the newborn ones were 2 or 14 days old. Pelvis blood vessels were filled with rubber latex stained with pigment. This was obtained with the help of a special automatic injector made by ourselves. After coagulation of injection substance the blood vessels were examined under a stereoscopic microscope, some microsurgical instruments adapted to our needs were used. The analysis of morphology and artery developmental markers as well as of ureter veins was carried out with reference to its proximal, middle and distal parts. On the basis of the results it was noticed that transformations of investigated vessels referred mainly to their number. place, kind of ostium and the area of ureter perfusion. Quantitative transformations of analyzed vessels occur first of all in fetuses of the 13th-40th week of pregnancy. Apart from main ureteral+ branches of examined organs as components of renal artery and vein, ovarian artery and vein. uterine branch of vaginal artery and vein, and umbilical artery, they have additional uretal branches, which at the end of pregnancy are reduced and do not take part in the ureter perfusion in newborn cattle. Main uretal branches occur both in fetuses and newborn cattle and they are characterized by increasing occurrence and tendency to widen perfusion range of the ureter wall. The average image of ureter arteries and veins, observed in the oldest fetuses (40th week of pregnancy) and newborn cattle, is similar to the species standard for the mature cattle as presented in other works. There are, however, different results of observations which are due to constant developmental and individual changes of the examined fetuses.
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PMID:[Arterial and venous vascularization of cow's ureter in the fetal and neonatal periods]. 327 3

A case of ureteral avulsion as a complication of ureteroscopy is presented. A 55-year-old woman was admitted to the hospital with the complaint of hematuria. The intravenous pyelography revealed a calculus measuring 16 x 12 mm located in the left upper ureter. Transurethral ureterolithotripsy was performed with 8 F rigid ureteroscopy. A safety guide wire was inserted and left ureteral olifice was dilated to 9 F. The ureteroscopy was smoothly introduced just under the stone. The stone was fragmentated with a pneumatic lithotripter. A part of the stone was pushed back to the renal pelvis, so the ureteroscope was passed to that stone and fragmentation was done as much as possible. The ureteroscopy was gently pulled out to the bladder, but the distal ureter was torn at the ureteral orifice and could be seen at the urethral orifice. Pelvis, upper ureter and middle ureter were intact, so open intervention for repair was not performed. A 6Fr double pigtail stent was placed over the safety guidewire. Cystscopy indicated a part of the distal ureter was protruded from the ureteral orifice. Eight weeks later, the protruded part of ureter was necrotic and calcified for ischemia. Transurethral resection of necrotic ureter was performed. Histologically, resected ureter changed necrotic tissue for ischema. Postoperatively intravenous pyelography did not reveal left hydronephrosis and cystoscopy indicated that the left ureteral orifice was almost normally repaired.
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PMID:[Ureteral avulsion: a rare complication of ureteroscopy]. 1793 41

Attention is called to the difference between the pathologist's and the radiologist's point of view. The reasons for this difference are discussed with special emphasis on renal tumours.Classification of renal tumours. The first main groups are innocent and malignant. Are these really clear-cut or do they blend into one another? The commoner innocent renal tumours are adenoma, fibroma, myoma, lipoma, and angioma. These are rarely of any clinical importance but adenoma is a possible source of hypernephroma. Many elaborate classifications of cancer of the kidney have been proposed but the following four groups are sufficient for most puposes: Carcinoma, hypernephroma, sarcoma, and teratoid tumours.Much the commonest malignant renal tumour in adults is the hypernephroma, thought by Grawitz and others to be derived from ectopic adrenal rests. There is still no agreement concerning their origin but three views are held at the present time: (a) All are carcinoma of renal tubules. (b) Some are derived from renal tubules and some from ectopic adrenal. (c) All are formed from adrenal tissue. These views are discussed with special reference to material in St. Mary's Hospital Museum, and it is suggested that the first view is the most probable although the second cannot be excluded.The teratoid tumours are the commonest in infants and swine. The differences between them and hypernephromata are described. The renal Pelvis, ureter, and bladder all have tumours of the same type and can conveniently be considered together. Connective tissue tumours, both innocent and malignant, are very rare. Papilloma and carcinoma are rare in the pelvis and ureter, but commoner in the bladder. The relation between these two tumours is discussed.
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PMID:The Pathology of Tumours of the Urinary Tract: (Section of Radiology). 1999 30