Megaureter is a medical anomaly whereby the ureter is abnormally dilated. Congenital megaureter is an uncommon condition which is more common in males, may be bilateral, and is often associated with other congenital anomalies. The cause is thought to be aperistalsis of the distal ureter, leading to dilatation. The cutoff value for megaureter is when it is wider than 6 or 7 mm.
Classification Essay Classification is the process of grouping together people or things that are alike in some way. A simple classification would be to classify cars in terms of their body size: full-size, mid-size, compacts, and sub-compacts, or Portland Community College in terms of its different campuses. These groups or categories, are helpful in letting you see relationships among people.
What is a megaureter?A megaureter means “big ureter” and is a descriptive term, not a diagnosis. The two important questions about megaureter are whether there is reflux (backwash) of urine causing the megaureter or whether there is blockage at the ureterovesical junction causing megaureter (Figure 1). If there is reflux, the diagnosis is “refluxing megaureter” or “megaureter.
This classification was reported by Smith and colleagues in 1977. 6 King 7 subsequently modified this classification in 1980 by adding a fourth group that consisted of the refluxing, obstructed megaureter (Fig. 21-2). He maintained the primary and secondary subclassifications. King’s classification now is most often referred to when describing a megaureter.
Refluxing megaureter: In this type, the urine flows back up the ureter from the bladder. This backflow, known as vesicoureteral reflux, expands the ureter. Primary obstructed megaureter: The ureter is too narrow where it enters the bladder, causing a blockage of urine flow at that point. There are also combinations of the two main types: Primary non-obstructed, non-refluxing megaureter: This.
Megaureter describes a ureter which is abnormally wide or dilated; in some cases it can be also tortuous and elongated. Other synonyms which have been used in the literature include megaloureter and hydroureter. Some authors have used the word megaureter to refer to only those cases with primary, intrinsic obstruction of the lower ureter. Until recently megaureter was considered by many to be.
Fetal MRI should be performed in the second or third trimester. As the teratogenic effects of MRI in early pregnancy are not confirmed and the multilayer structure of the cerebral parenchyma is appreciable after 16 weeks of gestation on a 1.5 T MR, MRI is best performed after completion of organogenesis (16 weeks).() The patients are advised to fast for 4 h prior to the study, to reduce bowel.
Congenital giant megaureter: Introduction. Congenital giant megaureter: A rare condition where the patient is born with an abnormally dilated ureter. The anomaly is often associated with other defects or anomalies. The severity of the anomaly is variable.
Primary obstructive megaureter (MOP) is one of the most common problem of pediatric urology. The evaluation and management of MOP in infants remains controversial. It is well-known that the majority of congenital megaureters may be managed conservatively, but the indications and surgical options in patients requiring intervention are less well defined. It is well known that most cases are.
CLASSIFICATION. Megaureter is a descriptive term aptly applied to the ureter that is dilated out of proportion to the rest of the urinary tract. The term implies a congenital disorder, and since the neonatal ureter contains a large amount of elastic fibers, it can become enormously wide. Congenital ureteral dilatation may be caused by vesicoureteral reflux, obstructive disease, high urine flow.
Megaureter in an adult is often due to distal obstruction, occasionally gross reflux or commonly idiopathic (i.e. developmental). Even if idiopathic the patient can be symptomatic due to urinary stasis leading to recurrent infection or calculi. The key to diagnosing an idiopathic cause is the absence of obstruction on a frusemide nuclear renal scan, lack of reflux on MCUG and the absence of.
Animals can be divided into groups or 'classified' by looking at the similarities and differences between them. Animals are divided into two main groups. Animals that have a backbone are called.
How is megaureter diagnosed? Ultrasound: This imaging test uses sound waves to form a picture of the structure of the kidneys, ureters, and bladder.; Voiding cystourethrogram (VCUG): A dye is dripped through a tube inserted into the urethra.The dye can be traced by an X-ray to see if it remains in the bladder or travels up the ureter.
Urinary tract defects Group I Group II Primary megaureter 2 1 Vesicoureteral reflux 5 6 Ureterocele 3 2 Summary 10 (15.38%) 9 (20.93%) TABLE 2: Characteristics of the selected parameters of children in group I and group II who underwent URSL procedure.
Megaureter. By Steve J. Hodges, David Werle, Gordon McLorie and Anthony Atala. Cite. BibTex; Full citation; Abstract. Almost one-quarter of the children referred to a pediatric urologist for obstructive uropathy suffer from an obstructive megaureter. However, not all megaureters are due to obstruction, as some may be the result of reflux and many simply represent a slightly skewed stage of.Megaureter is the medical term for an enlarged ureter. The ureter is a tube-like structure that urine passes through on its way from the kidney to the bladder. Each person has two ureters, one for each kidney. Together, the ureter and the kidney collecting system are referred to as the upper urinary tract. Boys are more likely than girls to have a megaureter. The condition often has no.The binomial system of naming species uses Latin words. Each name has two parts, the genus and the species. For example, human beings belong to the genus Homo, and our species is sapiens - so the.