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Pediatric Endocrinology (Expert Forum)
24 hour cortisol urine test results
Answered by
Deanna L Aftab Guy, MD - Short Stature, thyroid, Pituitary abnormalit, Puberty concerns, Rapid Growth, Adrenal problems, Parathyroid abnormal, Rickets and bone dis
Vanderbilt Children’s Hospital
Nashville - TN
Questions in the Pediatric Endocrinology forum are answered by Dr. Deanna L Aftab Guy, affiliated with Vanderbilt Children's Hospital. Topics covered include adrenal problems, diabetes insipidus, menstrual irregularities, obesity, parathyroid abnormalities, pituitary abnormalities, puberty concerns, rapid growth, rickets and bone disease, short stature, and thyroid.
24 hour cortisol urine test results
by Nic306, Jul 19, 2008 06:15AM
Hi, my son had a 24 hour free cortisol test run. The doctor said the results are normal but I am confused by them. The cortisol numbers are obviously normal as they fall within the reference ranges. But for the 24 hour Creatinine, Urine test his level was 385 mg/24hr and I believe it says the reference range is 800-2000. Then it says the Creatinine, Urine level is 77 mg/dL. There numbers appear to be much lower than the reference range but the lab didn't flag it as a concern. Since he was a baby, he is now 6, that level has always been off incuding the BUN ratio. From what I have read it has to do with kindney function and he does not urinate like everyone else. For example, he usually urinates about 2-3 times per day on a good day.
Doctor's Answer
by Deanna L Aftab Guy, MD, Aug 24, 2008 10:31AM
, Aug 24, 2008 10:31AM
To: Nic306
Let your physician interpret this test, the reason that creatinine is done on this test is to assess appropriate collection in order to be sure enough urine was done and also concentrated, the normals are not always age adjusted, talk with your doc, if they have any concerns about renal disease this is the area of another kind of expert and they can easily talk with them. I am glad to hear that 24 hr urine for free cortisol was normal, at times we repeat the test for a total of 3 times if indeed we are concerned about Cushing's Disease
