MPO - Overview: Myeloperoxidase Antibodies, IgG, Serum

Evaluating patients with clinical features anti-neutrophil cytoplasmic antibody associated vasculitis, specifically granulomatosis with polyangiitis, microscopic polyangiitis (MPA), and eosinophilic granulomatosis with polyangiitis...

TCGRV - Overview: T-Cell Receptor Gene Rearrangement, PCR, Varies

Determining whether a T-cell population is polyclonal or monoclonal using body fluid or tissue specimens

PLPMA - Overview: Prolactin, Pituitary Macroadenoma, Serum

Quantifying prolactin in serum specimens where the high-dose hook effect is suspected (eg, presence of pituitary tumor with symptoms of prolactinoma, and lower than expected serum prolactin concentration)

PR3 - Overview: Proteinase 3 Antibodies, IgG, Serum

Evaluating patients with clinical features of anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis, specifically granulomatosis with polyangiitis (GPA), microscopic polyangiitis, and eosinophilic granulomatosis with...

PTTP - Overview: Prothrombin Time, Plasma

Screening assay to detect deficiencies of one or more coagulation factors (factors I, II, V, VII, X) Screening assay to detect coagulation inhibition Monitoring intensity of oral anticoagulant therapy when combined with INR reporting

PRA - Overview: Renin Activity, Plasma

Investigation of primary aldosteronism (eg, adrenal adenoma/carcinoma and adrenal cortical hyperplasia) and secondary aldosteronism (renovascular disease, salt depletion, potassium loading, cardiac failure with ascites, pregnancy, Bartter...

23BPR - Overview: 2,3-Dinor 11 Beta-Prostaglandin F2 Alpha, Random, Urine

Screening for mast cell activation disorders including systemic mastocytosis using random urine specimens

VWAG - Overview: von Willebrand Factor Antigen, Plasma

Diagnosis of von Willebrand disease (VWD) and differentiation of VWD subtype (in conjunction with von Willebrand factor ristocetin cofactor activity and factor VIII coagulant activity) Differentiation of VWD from hemophilia A (in...

VWFMS - Overview: von Willebrand Factor Multimer Analysis, Plasma

Resolving discrepancies when results of complementary laboratory tests (eg, F8A / Coagulation Factor VIII Activity Assay, Plasma; VWACT / von Willebrand Factor Activity, Plasma; and VWAG / von Willebrand Factor Antigen, Plasma) are...

T4BPE - Overview: Thyroxine-Binding Protein Electrophoresis, Serum

Explaining unusual thyroxine (T4), free T4, and thyroxine-binding globulin test results that do not correlate with the patient's clinical presentation Detecting the presence of aberrant thyroxine-binding proteins, such as abnormal forms...