The main function of the urinary tract is to remove wastes and fluid from the body. The urinary tract has four parts: the kidneys, ureters, bladder and urethra. Urine is formed when the kidneys filter blood and remove excess waste materials and fluid. The urine collects into a part of the kidney called the renal pelvis. From the renal pelvis, the urine travels down a narrow tube called the ureter into the bladder. The bladder slowly fills up with urine, which empties from the body through another small tube called the urethra.
Paul A. Church, MD
Location and Office HoursUrology Practice Associates Inc
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What is the urinary tract?
National Kidney Foundation answered
What causes malrotated kidney?
Before birth, the kidneys normally pass through a complex series of developmental steps when they change position and orientation. Malrotated kidneys occur when these steps do not occur in the usual way so the kidney ends up in an abnormal position, orientation, or both. Malrotated kidneys are generally easily diagnosed by sonogram.
Often, kidney malrotation is found in an otherwise healthy infant or child, sometimes noticed on a prenatal (before birth) sonogram, and may not have any impact on health. In adults, kidney malrotation might be noticed when a person has body imaging for a completely different reason.
In some cases, a malrotated kidney can be associated with some functional problems in the way urine drains to the bladder and with vesicoureteral reflux (when some urine flows backwards through the urinary system). These problems may lead to urinary tract infections (UTI), which could be the only sign of the condition. More rarely, malrotated kidneys may be part of more complex combinations of congenital (birth) defects.
Additional testing or imaging might be recommended when a malrotated kidney is noticed in a baby, especially after a UTI.
What can cause kidney scarring?
Anthony Komaroff, MD, Internal Medicine, answeredScarring occurs during the healing process after damage to living tissue and cells. Scars are an imperfect process for damaged tissues to heal. Scarring usually does not cause pain. It can on rare occasions lead to impaired function of an organ if the scarring is extensive.
When this occurs in the kidney, it is usually the result of an infection within the kidney tissue. Very often, this occurs from a urinary tract infection. There would rarely be any related pain or other symptoms.
Scarring may be seen on imaging of the kidney (ultrasound, CAT scan, or MRI) without the person ever knowing they have scarring.
Another much less common cause of kidney scarring is a blood clot that prevents oxygen getting to a part of the kidney. This leads to damage of the tissue and the formation of scars.
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