ARUP's Laboratory Test Directory

Herpes Gestationis Factor (IgG Complement-Fixing Basement Membrane Zone Antibody) : 0092283

Mnemonic: HG FACTOR

Methodology: Quantitative Indirect Immunofluorescence
Performed: Varies
Reported: 5-8 days
Specimen Required: Collect: Plain red or serum separator tube.

Specimen Preparation: Transfer 2 mL serum to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature: Refrigerated.

Remarks: For specimens less than 0.5 mL, call the Immunodermatology lab at (866) 266-5699.

Unacceptable Conditions: Hemolyzed or lipemic specimens.

Stability (collection to initiation of testing): Ambient: 4 days; Refrigerated: 3 months; Frozen: Indefinitely

Reference Interval:
By report
Note: The methodology is indirect immunofluorescence (IFA) of serum on human split skin substrate for detection of complement-fixing (herpes gestationis factor) and non-complement-fixing IgG basement membrane zone antibodies.

Bullous Pemphigoid (180 kDa and 230 kDa) Antigens, IgG (ARUP test code 0092566) may be helpful in determining herpes gestationis.
CPT Code(s): 88347 x3; 83516