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Catalog ID CBG Corticosteroid-Binding Globulin (CBG)

Additional Codes

CPOE: Ref Corticosteroid-Binding Globulin (CBG)

DOE: Ref CBG

Specimen

Plain red tube, collect 2.0 mL blood

Centrifuge and separate from cells within 1 hour of collection

Serum, 1.0 mL (0.5 mL minimum), frozen

Rejection Criteria

Plasma, serum not separated from cells within 1 hour of collection, specimen at room temperature >48 hours, specimen refrigerated >48 hours, insufficient quantity, unlabelled specimen

Interpretative Information

Corticosteroid-binding globulin deficiency is a condition with subtle signs and symptoms, the most frequent being extreme tiredness (fatigue), especially after physical exertion. Many people with this condition have unusually low blood pressure (hypotension). Some affected individuals have a fatty liver or experience chronic pain, particularly in their muscles. These features vary among affected individuals, even those within the same family.

Many people with corticosteroid-binding globulin deficiency have only one or two of these features; others have no signs and symptoms of the disorder and are only diagnosed after a relative is found to be affected.

Some people with corticosteroid-binding globulin deficiency also have a condition called chronic fatigue syndrome. The features of chronic fatigue syndrome are prolonged fatigue that interferes with daily activities, as well as general symptoms, such as sore throat or headaches.

Performing Lab

Esoterix Endocrinology via ARUP Laboratories

Turn-Around-Time

6-13 days

Reference Values

Adults: 1.7 - 3.1 mg/dL

Pediatric ranges have not been established