014
Test #
Split Skin IgG & IgG4
CPT Code(s) #
88346, 88350
If Profile, Includes Tests:
N/A
Disease Name:
Pemphigoid, Epidermolysis Bullosa Acquisita (EBA), Bullous Pemphigoid, Bullous LE, Laminin 332 Autoimmunity
Type of Study:
Serum Studies
Methodology:
Indirect Immunofluorescence
Substrate:
Split Human Skin
Reference Range:
Negative: <1:5
Units:
Titer
Schedule:
Assay performed daily Monday-Friday. Report availability is within 48-72 hours from the time of specimen receipt.
Specimen Requirements:
Collect 2-5 ml of blood in a red top Vacutainer or serum separator (SST) tube, allow blood to clot, and centrifuge. Label tube appropriately.
Sample Stability:
Room temperature = stable during shipment
2ºC to 8ºC = 5 days
-25ºC to -15ºC = 1 year
Clinical Relevance:
Epidermolysis bullosa acquisita (EBA) can mimic bullous pemphigoid (BP) clinically, histologically and immunologically. In this indirect immunofluorescence assay, EBA and BP antibodies can be distinguished by their localization in skin that is split at the lamina lucida. This test and added follow up tests help differentiate EBA/bullous LE/anti-epiligrin cicatricial pemphigoid from bullous pemphigoid.
