This is a medical question of type : exams and tests 
 How to diagnose Childhood Nephrotic Syndrome ? 
 A health care provider diagnoses childhood nephrotic syndrome with
                
- a medical and family history  - a physical exam  - urine tests  - a blood test  - ultrasound of the kidney  - kidney biopsy
                
Medical and Family History
                
Taking a medical and family history is one of the first things a health care provider may do to help diagnose childhood nephrotic syndrome.
                
Physical Exam
                
A physical exam may help diagnose childhood nephrotic syndrome. During a physical exam, a health care provider most often
                
- examines a childs body  - taps on specific areas of the childs body
                
Urine Tests
                
A health care provider may order the following urine tests to help determine if a child has kidney damage from childhood nephrotic syndrome.
                
Dipstick test for albumin. A dipstick test performed on a urine sample can detect the presence of albumin in the urine, which could mean kidney damage. The child or a caretaker collects a urine sample in a special container. For the test, a nurse or technician places a strip of chemically treated paper, called a dipstick, into the childs urine sample. Patches on the dipstick change color when albumin is present in urine.
                
Urine albumin-to-creatinine ratio. A health care provider uses this measurement to estimate the amount of albumin passed into the urine over a 24-hour period. The child provides a urine sample during an appointment with the health care provider. Creatinine is a waste product filtered in the kidneys and passed in the urine. A high urine albumin-to-creatinine ratio indicates that the kidneys are leaking large amounts of albumin into the urine.
                
Blood Test
                
A blood test involves drawing blood at a health care providers office or a commercial facility and sending the sample to a lab for analysis. The lab tests the sample to estimate how much blood the kidneys filter each minute, called the estimated glomerular filtration rate, or eGFR. The test results help the health care provider determine the amount of kidney damage. Health care providers may also order other blood tests to help determine the underlying disease that may be causing childhood nephrotic syndrome.
                
Ultrasound of the Kidney
                
Ultrasound uses a device, called a transducer, that bounces safe, painless sound waves off organs to create an image of their structure. A specially trained technician performs the procedure in a health care providers office, an outpatient center, or a hospital. A radiologista doctor who specializes in medical imaginginterprets the images to see if the kidneys look normal; a child does not need anesthesia.
                
Kidney Biopsy
                
Biopsy is a procedure that involves taking a small piece of kidney tissue for examination with a microscope. A health care provider performs the biopsy in an outpatient center or a hospital. The health care provider will give the child light sedation and local anesthetic; however, in some cases, the child will require general anesthesia. A pathologista doctor who specializes in diagnosing diseasesexamines the tissue in a lab. The test can help diagnose childhood nephrotic syndrome.
                
When the health care provider suspects a child has minimal change disease, he or she often starts treatment with medications without performing a biopsy. If the medication is effective, the child does not need a biopsy. In most cases, a health care provider does not perform a biopsy on children younger than age 12 unless he or she thinks that another disease is the cause.