Units of Measurement - Mayo Clinic Laboratories

Units of Measure A list of common units used in the reporting of our assays has been defined. Refer to the table for these units as well as the recommended report abbreviations. Last updated: February 27, 2024...

APOEG - Overview: Apolipoprotein E Genotyping, Blood

Determining the specific apolipoprotein E (APOE) genotypes in individuals with type III hyperlipoproteinemia Determining the specific APOE genotypes that may increase risk for amyloid related imaging abnormalities in individuals being...

HPGLP - Overview: Hereditary Paraganglioma/Pheochromocytoma Panel, Varies

Evaluating patients with a personal or family history suggestive of a hereditary paraganglioma and pheochromocytoma (PGL/PCC) syndrome Establishing a diagnosis of a hereditary PGL/PCC, allowing for targeted surveillance based on...

BFLA1 - Overview: Lipid Analysis, Body Fluid

Distinguishing between chylous and nonchylous effusions

HTG2 - Overview: Thyroglobulin, Tumor Marker, Serum

Follow-up of patients with differentiated thyroid cancers after thyroidectomy and radioactive iodine ablation

PMPDD - Overview: PMP22 Gene, Large Deletion/Duplication Analysis, Varies

Diagnosis of Charcot-Marie-Tooth type 1A or hereditary neuropathy with liability to pressure palsies

DPYDQ - Overview: Dihydropyrimidine Dehydrogenase Genotype, Varies

Identifying individuals with genetic variants in DPYD who are at increased risk of toxicity when prescribed 5-fluorouracil (5-FU) or capecitabine chemotherapy treatment

TRBC3 - Overview: T-Cell Receptor Constant Beta Chain (TRBC1) +CD3 Immunostain, Technical Component Only

Determination of T-cell clonality in T-cell neoplasms

TRBC1 - Overview: T-Cell Receptor Constant Beta Chain (TRBC1) Immunostain, Technical Component Only

Determination of T-cell clonality in T-cell neoplasms

HGEMS - Overview: Hydroxyglutaric Acids, Glutaric Acid, Ethylmalonic Acid, and Methylsuccinic Acid, Serum

Evaluation of patients with an abnormal newborn screen showing elevations of glutarylcarnitine (C5-DC) using serum specimens Evaluation of patients with abnormal newborn screens showing elevations of C4- acylcarnitine to aid in the...

ALPI - Overview: Alkaline Phosphatase Isoenzymes, Serum

Aid in the diagnosis and treatment of liver, bone, intestinal, and parathyroid diseases Determining the tissue source of increased alkaline phosphatase (ALP) activity in serum Differentiating between liver and bone sources of elevated...

FENTS - Overview: Fentanyl, Serum

Monitoring fentanyl therapy

ALKP - Overview: Alkaline Phosphatase, Total and Isoenzymes, Serum

Aid in the diagnosis and treatment of liver, bone, intestinal, and parathyroid diseases Determining the tissue source of increased alkaline phosphatase (ALP) activity in serum Differentiating between liver and bone sources of elevated ALP

LUCHM - Overview: LiquidHALLMARK ctDNA and ctRNA

As an alternative to invasive tissue biopsies to assist in tumor profiling for diagnosis, predicting prognosis, and identifying targeted therapies for the treatment and management of patients with a solid tumor This test is not useful for...

UIOD - Overview: Iodine, 24 Hour, Urine

Assessing iodine toxicity or recent exposure in a 24-hour urine collection Monitoring iodine excretion rate as index of replacement therapy

COKEM - Overview: Cocaine and Metabolites Confirmation, Meconium

Detecting in utero drug exposure up to 5 months before birth

PSHIV - Overview: HIV-1 RNA Patient Source, Plasma

Detection and diagnosis of HIV-1 infection in an acutely or early infected individual (including infants of <2 years of age) who is the source of blood or body fluid in an occupational exposure event

COKMX - Overview: Cocaine and Metabolite Confirmation, Chain of Custody, Meconium

Detecting in utero drug exposure up to 5 months before birth Chain of custody is required whenever the results of testing could be used in a court of law. Its purpose is to protect the rights of the individual contributing the specimen by...

APGAL - Overview: Galactose-Alpha-1,3-Galactose (Alpha-Gal) Mammalian Meat Allergy Profile, Serum

As an aid in diagnosis of an IgE mediated hypersensitivity allergy to non-primate mammalian red meat, such as beef, pork, venison, and meat-derived products, such as gelatin, via allergen profile testing This test is not useful in patients...

MTHX - Overview: Methotrexate, Serum

Determining whether methotrexate is being cleared appropriately and verifying that a nontoxic concentration has been attained following therapy

IDHQ - Overview: IDH1 (R132) and IDH2 (R140 and R172) Quantitative Detection, Droplet Digital PCR, Varies

Detecting IDH1 R132 and IDH2 R140 and R172 mutations in acute myeloid leukemia patients at the time of diagnosis to guide targeted therapy Monitoring minimal residual disease during the clinical and therapeutic course

B6PRO - Overview: Vitamin B6 Profile (Pyridoxal 5-Phosphate and Pyridoxic Acid), Plasma

Determining vitamin B6 status, including in persons who present with progressive nerve compression disorders, such as carpal tunnel and tarsal tunnel syndromes Determining the overall success of a vitamin B6 supplementation program...

PLP - Overview: Pyridoxal 5-Phosphate, Plasma

Determining vitamin B6 status, including in persons who present with progressive nerve compression disorders, such as carpal tunnel and tarsal tunnel syndromes Determining the overall success of a vitamin B6 supplementation...

HGEMP - Overview: Hydroxyglutaric Acids, Glutaric Acid, Ethylmalonic Acid, and Methylsuccinic Acid, Plasma

Evaluation of patients with an abnormal newborn screen showing elevations of glutarylcarnitine (C5-DC) using plasma specimens Evaluation of patients with abnormal newborn screens showing elevations of C4- acylcarnitine to aid in the...

U1A1Q - Overview: Uridine Diphosphate (UDP) Glucuronosyltransferase 1A1 TA Repeat Genotype, UGT1A1, Varies

Identifying individuals who are at increased risk of adverse drug reactions with drugs that are metabolized by uridine diphosphate glucuronosyltransferase (UGT1A1); especially irinotecan but also atazanavir, nilotinib, pazopanib, and...

HBVQN - Overview: Hepatitis B Virus (HBV) DNA Detection and Quantification by Real-Time PCR, Serum

Detection and quantification of hepatitis B virus (HBV) DNA in serum of patients with chronic HBV infection (ie, hepatitis B surface antigen-positive) Monitoring disease progression in chronic HBV infection Monitoring response to anti-HBV...

HGEM - Overview: Hydroxyglutaric Acids, Glutaric Acid, Ethylmalonic Acid, and Methylsuccinic Acid, Blood Spot

Evaluation of patients with an abnormal newborn screen showing elevations of glutarylcarnitine (C5-DC) using dried blood spot specimens Evaluation of patients with abnormal newborn screens showing elevations of C4-acylcarnitine to aid in...

IOD - Overview: Iodine, Serum

Determining iodine overload using serum specimens Monitoring iodine levels in individuals taking iodine-containing drugs

HIQNP - Overview: HIV-1 RNA Detection and Quantification, Prenatal, Plasma

Diagnosis of HIV-1 infection in pregnant individuals with acute or early HIV-1 infection Quantifying plasma HIV-1 RNA levels (viral load) in pregnant individuals living with HIV-1: -Before initiating anti-HIV-1 drug therapy (baseline viral...

HIVQN - Overview: HIV-1 RNA Detection and Quantification, Plasma

Quantifying plasma HIV-1 RNA levels (viral load) in individuals living with HIV-1: -Before initiating antiretroviral therapy to obtain baseline viral load -Who may have developed HIV-1 drug resistance while on antiretroviral therapy -Who...

OROT - Overview: Orotic Acid, Random, Urine

Evaluation of the differential diagnosis of hyperammonemia and hereditary orotic aciduria Sensitive indicator of ornithine transcarbamylase (OTC) activity after administration of allopurinol or a protein load to identify OTC carriers

CHOU - Overview: Carbohydrate, Urine

Screening for conditions associated with increased excretion of carbohydrates, including inborn errors of fructose and galactose metabolism. This test is not recommended as a follow up test for abnormal newborn screening for galactosemia.

NGSFX - Overview: Reanalysis of Acute Myeloid Leukemia 4- or 11- Gene Panels, Additional Genes

Comprehensive reanalysis of a larger set of genes/gene regions when a more targeted gene panel was previously performed in this laboratory Evaluation of known or suspected hematologic neoplasms, specifically of myeloid origin (eg, acute...

PYRC - Overview: Pyruvate, Spinal Fluid

Investigating possible disorders of mitochondrial metabolism, when used in conjunction with cerebrospinal fluid lactate, collected at the same time, to determine the lactate-to-pyruvate (L:P) ratio Evaluating patients with neurologic...

IODCU - Overview: Iodine/Creatinine Ratio, Random, Urine

Assessment of iodine toxicity or recent iodine exposure using a random urine collection Monitoring iodine excretion rate as index of replacement therapy

MEASU - Overview: Measles Virus, Molecular Detection, PCR, Random, Urine

Identifying measles infection using random urine specimens

MEASR - Overview: Measles Virus, Molecular Detection, PCR, Throat

Identifying measles virus infection using throat swab specimens

PYR - Overview: Pyruvic Acid, Blood

Screening for possible disorders of mitochondrial metabolism, when used in conjunction with blood lactate collected at the same time, to determine the lactate-to-pyruvate ratio

ADULT - Overview: Adulterants Survey, Random, Urine

Assessment of possible adulteration of a urine specimen submitted for drug of abuse testing Providing the creatinine concentration for normalization purposes

HIVDR - Overview: HIV-1 Genotypic Drug Resistance to Reverse Transcriptase, Protease, and Integrase Inhibitors, Plasma

Identifying HIV-1 genotypic mutations associated with resistance to nucleotide and non-nucleoside reverse-transcriptase inhibitors, protease inhibitors, and integrase strain transfer inhibitors Guiding initiation or change of combination...

NGSHM - Overview: MayoComplete Myeloid Neoplasms, Comprehensive OncoHeme Next-Generation Sequencing, Varies

Evaluation of known or suspected hematologic neoplasms, specifically of myeloid origin (eg, acute myeloid leukemia, myelodysplastic syndrome, myeloproliferative neoplasm, myelodysplastic/myeloproliferative neoplasm, unexplained cytopenias)...

A1APP - Overview: Alpha-1-Antitrypsin Phenotype, Serum

Identification of homozygous and heterozygous phenotypes of the alpha-1-antitrypsin deficiency

ADLTX - Overview: Adulterants Survey, Chain of Custody, Random, Urine

Assess the possible adulteration of a urine specimen submitted for drug of abuse testing Providing the urine creatinine concentration for normalization purposes Chain of custody is required whenever the results of testing could be used...

FUFXS - Overview: Fragile X, Follow-up Analysis

Confirming the methylation status of the repeat expansion allele in the FMR1 gene, to aid the diagnosis of FMR1-related disorders

C2AD2 - Overview: PrecivityAD2, Plasma

Assisting in the evaluation of adult patients, aged 55 years and older, with signs or symptoms of mild cognitive impairment or dementia who are being assessed for Alzheimer disease and other causes of cognitive decline This is not intended...

XALDZ - Overview: X-Linked Adrenoleukodystrophy, Full Gene Analysis, Varies

Confirming a diagnosis of X-linked adrenoleukodystrophy Identifying a variant in the ABCD1 gene

POX - Overview: Fatty Acid Profile, Peroxisomal (C22-C26), Serum

Evaluating patients with possible peroxisomal disorders, single-enzyme defects of peroxisomal metabolism, such as X-linked adrenoleukodystrophy or peroxisomal biogenesis disorders (Zellweger syndrome spectrum) using serum specimens Aiding...

POXP - Overview: Fatty Acid Profile, Peroxisomal (C22-C26), Plasma

Evaluating patients with possible peroxisomal disorders, including peroxisomal biogenesis disorders, X-linked adrenoleukodystrophy, and Refsum disease using plasma specimens Aiding in the assessment of peroxisomal function

IMSNP - Overview: Inherited Motor and Sensory Neuropathy Gene Panel, Varies

Establishing a molecular diagnosis for patients with hereditary motor and sensory neuropathy (HMSN) or Charcot-Marie-Tooth (CMT) disease Identifying variants within genes known to be associated with HMSN or CMT disease, allowing for...

DHTS - Overview: Dihydrotestosterone, Serum

Monitoring patients receiving 5-alpha reductase inhibitor therapy or chemotherapy Evaluating patients with possible 5-alpha reductase deficiency