C3 - Overview: Complement C3, Serum

Assessing disease activity in systemic lupus erythematosus Investigating an undetectable total complement level

CD7 - Overview: CD7 Immunostain, Technical Component Only

Identification of T cells and natural killer cells

C4 - Overview: Complement C4, Serum

Investigating an undetectable total complement Confirming hereditary angioedema (with low C1 inhibitor) Assessing disease activity in systemic lupus erythematosus, proliferative glomerulonephritis, rheumatoid arthritis, and autoimmune...

CYSPR - Overview: Cyclosporine, Blood

Monitoring whole blood cyclosporine concentration during therapy, particularly in individuals coadministered cytochrome P450 (CYP) 3A4 substrates, inhibitors, or inducers Adjusting dose to optimize immunosuppression while minimizing...

SFINC - Overview: Cerebrospinal Fluid (CSF) IgG Index, Spinal Fluid

Aiding in the diagnosis of multiple sclerosis and other central nervous system inflammatory conditions using cerebrospinal fluid specimens

PLFAT - Overview: Cryptococcus Antigen Titer, Lateral Flow Assay, Pleural Fluid

Diagnosis of infection with Cryptococcus species

CYTNG - Overview: Cytology Non-Gynecologic, Varies

Detecting malignant and premalignant changes

CD2B - Overview: CD2 Immunostain, Bone Marrow, Technical Component Only

Determining T-cell lineage

CITRA - Overview: Citrate Excretion, Random, Urine

Diagnosing risk factors for patients with calcium kidney stones using random urine specimens Monitoring results of therapy in patients with calcium stones or renal tubular acidosis

C19BM - Overview: CD19 Immunostain, Bone Marrow, Technical Component Only

Identification of normal and neoplastic B cells