MPS3B - Overview: Mucopolysaccharidosis III, Three-Enzyme Panel, Blood Spot

Supporting the biochemical diagnosis of mucopolysaccharidoses types IIIA, IIIB, IIIC This test is not useful for carrier detection.

NMOFS - Overview: Neuromyelitis Optica (NMO)/Aquaporin-4-IgG Fluorescence-Activated Cell Sorting (FACS) Assay, Serum

Diagnosis of a neuromyelitis optica spectrum disorder (NMOSD) Diagnosis of autoimmune AQP4 channelopathy Diagnosis of neuromyelitis optica (NMO) Distinguishing NMOSD from multiple sclerosis early in the course of disease

OXNP - Overview: Oxysterols, Plasma

Investigating a possible diagnosis of Niemann-Pick disease types A, B, or C using plasma specimens Monitoring of individuals with Niemann-Pick type C disease This test is not useful for the identification of carriers.

NR4A3 - Overview: NR4A3 (9q22.33) Rearrangement, FISH, Tissue

Identifying NR4A3 gene rearrangements Supporting the diagnosis of extraskeletal myxoid chondrosarcoma or acinic cell carcinoma when used in conjunction with an anatomic pathology consultation

NSE - Overview: Neuron-Specific Enolase, Serum

A follow-up marker in patients with neuron-specific enolase-secreting tumors of any type An auxiliary test in the diagnosis of small cell lung carcinoma An auxiliary test in the diagnosis of carcinoids, islet cell tumors, and...

PLINK - Overview: Paroxysmal Nocturnal Hemoglobinuria, PI-Linked Antigen, Blood

Screening for and confirming the diagnosis of paroxysmal nocturnal hemoglobinuria (PNH) Monitoring patients with PNH

PLAFL - Overview: Platelet Surface Glycoprotein by Flow Cytometry, Blood

Identification of markedly decreased CD41 (GPIIb) and CD61 (GPIIIa) expression levels, which are diagnostic for Glanzmann thrombasthenia Identification of markedly decreased CD42a (GPIX) and CD42b (GPIb-alpha) expression levels, which are...

PVLE - Overview: Paraneoplastic Vision Loss Evaluation, Serum

Evaluating patients with rapidly progressive vision loss where a paraneoplastic cause for vision loss (retinopathy or optic neuritis with other findings [eg, retinitis] is suspected) Evaluating patients with small-cell carcinoma who...

HPCOV - Overview: Severe Acute Respiratory Syndrome Coronavirus 2 (SARS CoV-2), Molecular Detection, Varies

Diagnosis of COVID-19 illness due to SARS-CoV-2

TXMGP - Overview: Toxoplasma gondii Antibody, IgM and IgG, Serum

Determining whether a patient has had previous exposure to or recent infection with Toxoplasma gondii IgG is not useful for diagnosing infection in infants younger than 6 months of age. IgG antibodies in this age group usually are the...