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Casts details
What Casts shows
Casts are tiny tube-shaped particles that form in the kidney's small tubules and are then washed out in urine. They are made of a protein matrix and may contain cells or other material. They are reported when your urine sample is examined under a microscope as part of a urinalysis, and they help show what is happening inside the kidneys. A few clear, hyaline casts can be seen in healthy people, especially after exercise or with dehydration. Casts containing red cells, white cells or other material can point to kidney inflammation, infection or other kidney disease. The finding is interpreted with the type of cast, other urine results and kidney blood tests.
Tests that include Casts
This test is crucial for checking the chemical makeup of urine and its connection to different health conditions. It includes a dipstick test to quickly identify various substances in the urine and a microscopic exam to spot cells and other elements that shouldn't be there.
Biomarkers
- Amorphous Sediment Reports amorphous crystals in a urine sample, shapeless mineral deposits that form as urine cools and are usually not a sign of disease.
- Appearance Describes how clear or cloudy your urine sample looks, a basic part of urinalysis that can hint at infection, crystals or other particles.
- Bacteria Reports whether bacteria are seen in your urine sample, a clue to a possible urinary tract infection that is interpreted with other urine results.
- Bilirubin Checks for bilirubin in your urine, which is normally absent and can appear when the liver or bile ducts are not working properly.
- Calcium Oxalate Crystals Reports calcium oxalate crystals seen when a urine sample is examined under the microscope, which can be normal or linked to kidney stone risk.
- Casts Reports casts seen when a urine sample is examined under the microscope; casts form in the kidney's tubules and some types can point to kidney problems.
- Color Describes the color of your urine sample, a simple first observation in a urinalysis that can reflect hydration, foods, medications or substances such as blood.
- Crystals Looks for crystals in your urine under the microscope, which are often harmless but can sometimes relate to kidney stones, metabolism or medications.
- Glucose (Urine) Checks for glucose in your urine as part of a urinalysis, which can point to high blood sugar or, less often, a kidney handling problem.
- Granular Casts Granular casts are tiny particles seen under the microscope in urine; increased numbers can point to kidney tubule injury or kidney disease.
- Hyaline Casts Clear, cylinder-shaped protein structures formed in the kidney tubules, counted in urine microscopy as one of several clues to kidney function and hydration.
- Ketones Detects ketones in urine, substances made when your body burns fat for energy, used to look at fasting, low-carbohydrate diets, and diabetes control.
- Leukocyte Esterase Detects leukocyte esterase, an enzyme released by white blood cells, in urine, used as a sign of white cells that can point to a urinary tract infection.
- Nitrite Checks your urine for nitrite, which is produced when certain bacteria are present, as a screening sign of a urinary tract infection.
- Occult Checks your urine for hidden (occult) blood using a dipstick that reacts to hemoglobin from red blood cells, even when urine looks normal.
- pH Measures how acidic or alkaline your urine is, a routine part of urinalysis that can reflect diet, kidney handling of acid, and some infections.
- Protein A urinalysis screen for protein in your urine, used to look for signs that the kidneys may be leaking protein.
- Red Blood Cells (RBC), Urine Counts red blood cells seen under the microscope in your urine, used to look for bleeding anywhere in the kidneys or urinary tract.
- Renal Epithelial Cells Counts renal epithelial cells seen under the microscope in your urine, cells from the kidney tubules that can signal kidney injury.
- Specific Gravity Measures how concentrated your urine is compared with water, giving a quick look at hydration and the kidneys' ability to concentrate or dilute urine.
- Squamous Epithelial Cells Counts squamous epithelial cells in a urine sample, mainly showing whether the sample was contaminated by skin cells from the outer genital area.
- Transitional Epithelial Cells Counts transitional epithelial cells in urine, cells that line the bladder and urinary tract, as part of a routine urine microscopy.
- Triple Phosphate Crystals Detects triple phosphate (struvite) crystals in urine, which usually form in alkaline urine and can be linked to certain urinary infections.
- Uric Acid Crystals Detects uric acid crystals in a urine sample, which tend to form in acidic urine and can be linked to uric acid kidney stones.
- White Blood Cells (WBC), Urine Counts white blood cells in a urine sample, used mainly to look for inflammation or infection in the urinary tract.
- Yeast Reports yeast cells seen in a urine sample under the microscope, which can point to a yeast infection or to contamination of the sample.
This test involves a detailed microscopic examination to identify any abnormal cells or elements in the urine. It's a crucial step in diagnosing various conditions that affect the urinary tract and kidneys.
Biomarkers
- Amorphous Sediment Reports amorphous crystals in a urine sample, shapeless mineral deposits that form as urine cools and are usually not a sign of disease.
- Bacteria Reports whether bacteria are seen in your urine sample, a clue to a possible urinary tract infection that is interpreted with other urine results.
- Calcium Oxalate Crystals Reports calcium oxalate crystals seen when a urine sample is examined under the microscope, which can be normal or linked to kidney stone risk.
- Casts Reports casts seen when a urine sample is examined under the microscope; casts form in the kidney's tubules and some types can point to kidney problems.
- Crystals Looks for crystals in your urine under the microscope, which are often harmless but can sometimes relate to kidney stones, metabolism or medications.
- Granular Casts Granular casts are tiny particles seen under the microscope in urine; increased numbers can point to kidney tubule injury or kidney disease.
- Hyaline Casts Clear, cylinder-shaped protein structures formed in the kidney tubules, counted in urine microscopy as one of several clues to kidney function and hydration.
- Red Blood Cells (RBC), Urine Counts red blood cells seen under the microscope in your urine, used to look for bleeding anywhere in the kidneys or urinary tract.
- Renal Epithelial Cells Counts renal epithelial cells seen under the microscope in your urine, cells from the kidney tubules that can signal kidney injury.
- Squamous Epithelial Cells Counts squamous epithelial cells in a urine sample, mainly showing whether the sample was contaminated by skin cells from the outer genital area.
- Transitional Epithelial Cells Counts transitional epithelial cells in urine, cells that line the bladder and urinary tract, as part of a routine urine microscopy.
- Triple Phosphate Crystals Detects triple phosphate (struvite) crystals in urine, which usually form in alkaline urine and can be linked to certain urinary infections.
- Uric Acid Crystals Detects uric acid crystals in a urine sample, which tend to form in acidic urine and can be linked to uric acid kidney stones.
- White Blood Cells (WBC), Urine Counts white blood cells in a urine sample, used mainly to look for inflammation or infection in the urinary tract.
- Yeast Reports yeast cells seen in a urine sample under the microscope, which can point to a yeast infection or to contamination of the sample.
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