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Contamination of the sample with blood from a non-urinary source, such as from menstruation or rectal bleeding, can mimic hematuria, [99] and microscopic hematuria is sometimes observed in healthy people after exercise. [98] Other causes of microscopic hematuria include UTI, kidney stones, benign prostatic hyperplasia, and trauma to the urinary ...
The Paris System for reporting urine cytology, version 2.0, ranging from negative to positive for high grade urothelial carcinoma. [1] Urine cytology is a test that looks for abnormal cells in urine under a microscope. The test commonly checks for infection, inflammatory disease of the urinary tract, cancer, or precancerous conditions.
Urinary casts are microscopic cylindrical structures produced by the kidney and present in the urine in certain disease states. They form in the distal convoluted tubule and collecting ducts of nephrons , then dislodge and pass into the urine, where they can be detected by microscopy .
A urine test is any medical test performed on a urine specimen. The analysis of urine is a valuable diagnostic tool because its composition reflects the functioning of many body systems, particularly the kidneys and urinary system, and specimens are easy to obtain. [1]
Under microscopy, the urinary system is covered in a unique lining called urothelium, a type of transitional epithelium. Unlike the epithelial lining of most organs, transitional epithelium can flatten and distend. Urothelium covers most of the urinary system, including the renal pelvis, ureters, and bladder.
[2] [6] Microscopic hematuria is present when there are three or more red blood cells per high power field. [3] In terms of the anatomical origin, blood or red blood cells can enter and mix with urine at multiple anatomical sites within the urinary system, including the kidney, ureter, urinary bladder, and urethra, and in men, the prostate. [1]
Records of urinalysis for uroscopy date back as far as 4000 BC, originating with Babylonian and Sumerian physicians. [1] At the outset of the 4th century BC Greek physician Hippocrates hypothesized that urine was a "filtrate" of the four humors, and limited possible the diagnoses resulting from this method to issues dealing with the bladder, kidneys, and urethra. [2]
It may occur in the case of diseases of the urinary tract, reproductive system and diseases of the abdominal organs. [6] Leukocyturia is mostly a sign of urinary tract infection, especially if significant bacteriuria is found (for most people, the number of bacteria in a culture is > 10^5) and other symptoms associated with passing urine. [7]