Sorted By Test Name - Mayo Medical Laboratories

PTHFN
61526
Females
0-11 months: not established**
1-7 years: 4.3-5.4 mg/dL
8-13 years: 4.0-5.2 mg/dL
14-15 years: 3.5-4.9 mg/dL
16-17 years: 3.1-4.7 mg/dL
> or =18 years: 2.5-4.5 mg/dL
CREATININE
Males
0-11 months: not established
1-2 years: 0.1-0.4 mg/dL
3-4 years: 0.1-0.5 mg/dL
5-9 years: 0.2-0.6 mg/dL
10-11 years: 0.3-0.7 mg/dL
12-13 years: 0.4-0.8 mg/dL
14-15 years: 0.5-0.9 mg/dL
> or =16 years: 0.8-1.3 mg/dL
Females
0-11 months: not established
1-3 years: 0.1-0.4 mg/dL
4-5 years: 0.2-0.5 mg/dL
6-8 years: 0.3-0.6 mg/dL
9-15 years: 0.4-0.7 mg/dL
> or =16 years: 0.6-1.1 mg/dL
*The serum concentration of calcium varies significantly during the immediate neonatal period. In
general, the serum calcium concentration decreases over the first days of life, followed by a gradual
increase to adult concentrations by the second or third week of life.
**The plasma concentrations of inorganic phosphate in the neonatal period can be greater than those of
the adult.
Clinical References: 1. Boudou P, Ibrahim F, Cormier C, et al: Third- or second-generation
parathyroid hormone assays: a remaining debate in the diagnosis of primary hyperparathyroidism. J Clin
Endocrinol Metab 2005;90(12):6370-6372 2. Silverberg SJ, Bilezikian JP: The diagnosis and
management of asymptomatic primary hyperparathyroidism. Nat Clin Pract Endocrinol Metab
2006;2(9):494-503 3. Brossard JH, Cloutier M, Roy L, et al: Accumulation of a non-(1-84) molecular
form of parathyroid hormone (PTH) detected by intact PTH assay in renal failure: importance in the
interpretation of PTH values. J Clin Endocrinol Metab 1996;81:3923-3929 4. Garfield N, Karaplis AC:
Genetics and animal models of hypoparathyroidism. Trends Endocrinol Metab 2001;12:288-294 5.
Sakhaee K: Is there an optimal parathyroid hormone level in end-stage renal failure: the lower the better?
Curr Opin Nephrol Hypertens 2001;10:421-427 6. Vetter T, Lohse MJ: Magnesium and the parathyroid.
Curr Opin Nephrol Hypertens 2002;11:403-410 7. Bilezikian JP, Potts JT Jr, Fuleihan Gel-H, et al:
Summary statement from a workshop on asymptomatic primary hyperparathyroidism: a perspective for
the 21st century. J Clin Endocrinol Metab 2002;87:5353-5361
Parathyroid Hormone, Fine-Needle Aspiration Biopsy
(FNAB)-Needle Wash
Clinical Information: Parathyroid hormone (PTH) is produced and secreted by the parathyroid
glands, which are located along the posterior aspect of the thyroid gland. PTH analysis in rinse material
obtained from fine-needle aspiration biopsies (FNAB) has gained popularity to discriminate thyroid
tissues from enlarged parathyroid glands and also to facilitate parathyroid localization prior to surgery.
Various groups have reported on the utility of this technique with specificity of 91% to100% and
sensitivity of 91% to 100%. Measuring PTH in the rinse material proved very useful in cases of
nondiagnostic cytology. Comparing the results of the PTH rinse material with serum PTH is highly
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