MAGRU - Overview: Magnesium/Creatinine Ratio, Random, Urine

Assessing the cause of abnormal serum magnesium concentrations Determining whether nutritional magnesium loads are adequate Calculating urinary calcium oxalate and calcium phosphate supersaturation and assessing kidney stone risk.

PIK3T - Overview: PIK3CA Mutation Analysis, Tumor

Identification of hormone receptor positive and human epidermal growth factor receptor 2 negative (HR+/HER2-) advanced breast cancer tumors that may be eligible for treatment with targeted kinase inhibitor therapy (eg, alpelisib).

PBGU - Overview: Porphobilinogen, Quantitative, Random, Urine

First-order test for evaluating a suspected acute porphyria: acute intermittent porphyria, hereditary coproporphyria, and variegate porphyria

PPFE - Overview: Protoporphyrins, Fractionation, Whole Blood

Evaluating patients with possible diagnoses of erythropoietic protoporphyria or X-linked dominant protoporphyria Establishing a biochemical diagnosis of erythropoietic protoporphyria and X-linked dominant protoporphyria

PIPU - Overview: Pipecolic Acid, Random, Urine

Differentiating between disorders of peroxisomal biogenesis (eg, Zellweger syndrome) and disorders with loss of a single peroxisomal function Detecting abnormal elevations of pipecolic acid in urine

PRSSZ - Overview: PRSS1 Gene, Full Gene Analysis, Varies

Confirmation of suspected clinical diagnosis of hereditary pancreatitis (HP) in patients with chronic pancreatitis Identification of familial PRSSI mutation to allow for predictive and diagnostic testing in family members

PIPA - Overview: Pipecolic Acid, Serum

Differentiating between disorders of peroxisomal biogenesis (eg, Zellweger syndrome) and disorders with loss of a single peroxisomal function Detecting abnormal elevations of pipecolic acid in serum

YMCRO - Overview: Y Chromosome Microdeletions, Molecular Detection, Varies

Evaluating men with azoospermia, severe oligozoospermia, or otherwise unexplained male factor infertility

UPGC - Overview: Uroporphyrinogen III Synthase (Co-Synthase), Erythrocytes

Diagnosis of congenital erythropoietic porphyria This test is not useful for diagnosis of acute intermittent porphyria (AIP).

A1R - Overview: A1 Antigen Subtype, Blood

Additional proof of alloantibody specificity Assessment of solid organ transplantation donor compatibility This test is not useful for the purpose of establishing paternity.