A-Z of Kidney Function, Nephrology & Long-Term Renal Health Terms

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Acute Kidney Injury (AKI)

Acute Kidney Injury (AKI) is a sudden decline in kidney function that can occur over hours or days. AKI may result from dehydration, infection, surgery, chemotherapy, reduced blood flow to the kidneys, or other medical conditions. Prompt recognition and treatment are important because severe AKI can affect long-term kidney health and overall recovery.

 

Albuminuria

Albuminuria refers to the presence of albumin, a type of protein, in the urine. Healthy kidneys normally prevent significant amounts of protein from entering the urine. Persistent albuminuria may indicate kidney damage or impaired kidney function and is sometimes monitored during long-term survivorship care.

 

Blood Pressure Monitoring

Blood pressure monitoring is an important component of Wilms tumor treatment and survivorship care. Because the kidneys play a key role in regulating blood pressure, children treated for kidney cancer may have an increased risk of hypertension. Regular monitoring helps identify abnormalities early and supports long-term cardiovascular health.

 

Chronic Kidney Disease (CKD)

Chronic Kidney Disease (CKD) is a long-term condition in which kidney function gradually declines over time. Although many Wilms tumor survivors maintain excellent kidney function, some may develop CKD due to surgery, chemotherapy, radiation therapy, congenital kidney abnormalities, or other health factors. Lifelong monitoring can help identify and manage kidney-related complications.

 

Creatinine Clearance

Creatinine clearance is a measure of how effectively the kidneys remove creatinine from the bloodstream. It is often used to assess kidney function and may help guide medication dosing, treatment planning, and survivorship monitoring. Reduced creatinine clearance can indicate impaired kidney performance.

 

Dialysis

Dialysis is a medical treatment that performs some of the functions normally carried out by healthy kidneys. Dialysis removes waste products, excess fluids, and toxins from the bloodstream when kidney function becomes severely impaired. Although uncommon in most Wilms tumor patients, dialysis may be required in rare cases involving significant kidney failure or bilateral nephrectomy.

 

Electrolyte Balance

Electrolyte balance refers to maintaining healthy levels of minerals such as sodium, potassium, calcium, chloride, and bicarbonate in the body. The kidneys play a central role in regulating electrolyte levels. Abnormal electrolyte balance can affect heart function, muscle activity, nerve signaling, and overall health.

 

End-Stage Kidney Disease (ESKD)

End-Stage Kidney Disease (ESKD) is the most severe form of chronic kidney disease and occurs when the kidneys can no longer adequately support the body's needs. Individuals with ESKD typically require dialysis or kidney transplantation. Fortunately, ESKD is relatively uncommon among most Wilms tumor survivors.

 

Estimated Glomerular Filtration Rate (eGFR)

Estimated Glomerular Filtration Rate (eGFR) is one of the most commonly used measures of kidney function. eGFR estimates how efficiently the kidneys filter waste products from the blood and helps healthcare professionals monitor renal health over time. Changes in eGFR may indicate declining kidney function and warrant further evaluation.

 

Glomerular Filtration Rate (GFR)

Glomerular Filtration Rate (GFR) is the amount of blood filtered by the kidneys each minute. GFR is considered one of the best indicators of overall kidney function and is commonly monitored in children who have undergone nephrectomy or received kidney-related cancer treatments.

 

Hematuria

Hematuria refers to the presence of blood in the urine. Hematuria may occur before diagnosis, during treatment, or as part of other kidney-related conditions. While not always serious, persistent or unexplained blood in the urine should always be evaluated by a healthcare professional.

 

Hypertension

Hypertension, or high blood pressure, can occur both before and after Wilms tumor treatment. Kidney disease, reduced kidney function, tumor-related hormonal changes, and treatment-related effects may contribute to hypertension. Long-term blood pressure monitoring is an important aspect of survivorship care.

 

Kidney Failure

Kidney failure occurs when the kidneys can no longer adequately remove waste products and maintain normal body functions. Kidney failure may be acute or chronic and can range from mild impairment to severe disease requiring dialysis or transplantation. Early detection and management help reduce the risk of progression.

 

Kidney Function

Kidney function refers to the kidneys' ability to filter blood, regulate fluids, balance electrolytes, remove waste products, and support overall health. Because Wilms tumor directly affects the kidneys, preserving kidney function remains a major priority throughout treatment and survivorship.

 

Kidney Function Tests

Kidney function tests are laboratory investigations used to assess how effectively the kidneys are working. Common tests include creatinine, urea, eGFR, electrolyte measurements, and urine analysis. These tests help monitor treatment effects and long-term renal health.

 

Kidney Health

Kidney health refers to the overall condition and performance of the kidneys. Maintaining kidney health is particularly important for Wilms tumor survivors because many have undergone nephrectomy or received treatments that can affect renal function. Healthy lifestyle habits and regular medical follow-up support long-term kidney wellness.

 

Kidney Preservation

Kidney preservation refers to treatment approaches designed to protect and maintain healthy kidney tissue whenever possible. Nephron-sparing surgery, careful treatment planning, and long-term monitoring all contribute to kidney preservation efforts in children with Wilms tumor.

 

Kidney Transplant

A kidney transplant is a surgical procedure in which a healthy donor kidney is transplanted into a patient with severe kidney failure. Kidney transplantation may become necessary in rare situations involving bilateral nephrectomy, end-stage kidney disease, or significant renal dysfunction.

 

Microalbuminuria

Microalbuminuria refers to small amounts of albumin in the urine that are not detectable through routine urine testing. It may be an early sign of kidney damage and is often monitored in patients at increased risk of renal complications.

 

Nephrectomy

A nephrectomy is the surgical removal of a kidney and remains one of the most common treatments for unilateral Wilms tumor. Following nephrectomy, the remaining kidney typically adapts and performs the work previously carried out by both kidneys. Long-term monitoring helps ensure healthy renal function is maintained.

 

Nephrology

Nephrology is the branch of medicine dedicated to the diagnosis, treatment, and management of kidney diseases. Nephrologists play an important role in caring for children with Wilms tumor, particularly when kidney function concerns, hypertension, or long-term renal health issues arise.

 

Nephrologist

A Nephrologist is a physician who specializes in kidney health and kidney diseases. Pediatric nephrologists frequently participate in the care of children with Wilms tumor and may provide long-term follow-up for survivors with renal health concerns.

 

Proteinuria

Proteinuria refers to the presence of excessive protein in the urine. It may indicate kidney damage, impaired filtration function, or other renal abnormalities. Proteinuria is often monitored during survivorship because it can be an early sign of kidney dysfunction.

 

Renal Function

Renal function is another term used to describe how effectively the kidneys perform their essential tasks. Maintaining healthy renal function is a key objective of treatment planning and survivorship care for children affected by Wilms tumor.

 

Renal Insufficiency

Renal insufficiency refers to reduced kidney function that is not severe enough to be classified as kidney failure. Children with renal insufficiency may require closer monitoring, lifestyle modifications, and ongoing medical follow-up to prevent further decline in kidney performance.

 

Renal Reserve

Renal reserve refers to the kidney's ability to increase filtration and workload when needed. After nephrectomy, the remaining kidney often develops enhanced renal reserve to compensate for the loss of the other kidney. This adaptive response helps maintain normal overall kidney function in many survivors.

 

Single Kidney

A single kidney refers to the presence of only one functioning kidney. Many Wilms tumor survivors live healthy lives with a single kidney following nephrectomy. However, long-term monitoring remains important because the remaining kidney carries the full responsibility for maintaining renal function.

 

Solitary Kidney

A solitary kidney is another term used to describe a person living with one functioning kidney. Most individuals with a solitary kidney experience normal growth, development, and quality of life, although ongoing monitoring is recommended to support long-term renal health.

 

Urea

Urea is a waste product generated when the body breaks down proteins. Healthy kidneys remove urea from the bloodstream and excrete it through urine. Measuring blood urea levels helps assess kidney function and monitor for renal complications.

 

Urinalysis

Urinalysis is a laboratory test that evaluates urine for blood, protein, infection, glucose, and other abnormalities. Urinalysis is frequently used to monitor kidney health before, during, and after Wilms tumor treatment.

 

Urine Protein Monitoring

Urine protein monitoring involves testing urine samples for evidence of protein leakage from the kidneys. This monitoring helps identify early signs of kidney damage and supports long-term survivorship care.

 

Wilms Tumor Survivorship Kidney Monitoring

Wilms Tumor Survivorship Kidney Monitoring refers to the ongoing assessment of renal health after treatment has been completed. Monitoring typically includes blood pressure checks, kidney function tests, urine testing, and periodic medical evaluations designed to identify complications early and preserve lifelong kidney health.