Laboratory Medicine

Test Directory / IgG4

IgG4

Brown clotted serum, gel barrier

Test	IgG4
Common Abbreviations	IgG4
Profile	NA
Tube type	Brown clotted serum, gel barrier
Clinical Indication	Immunoglobulin G4-related disease (IgG4RD) is an immune-mediated fibroinflammatory condition that is capable of affecting multiple organs. Common forms of presentation include autoimmune pancreatitis, sclerosing cholangitis, major salivary gland enlargement or sclerosing sialadenitis, orbital disease, retroperitoneal fibrosis.
Specimen Type	Blood
Sample type	Serum
Minimum Volume	0.5mL
Special Precautions	No special requirements
Stability	8 days at 2-8oC, -20oC for prolonged storage.
Turnaround Time	2 weeks
Laboratory	York
Reference Interval	<1.3g/L (adults) Age-related ref. ranges for paediatrics quoted on report
Limitations	No significant assay interference effects were observed when tested with intra lipids (250mg/dL), bilirubin (200mg/L) or haemoglobin (5g/L).
Notes

Update for visitors

Visiting restrictions are in place at our hospitals to stop the spread of norovirus. These restrictions will be in place until further notice.

The following wards are closed to visitors:

York Hospital: Ward 29 and Ward 37.

There are four exceptions only to the restrictions. These are:

For patients who are receiving end of life care

Paediatric patients (babies and children)

Maternity care

The family carers of those with dementia

We understand these restrictions can be difficult when a loved one is unwell. The restrictions will be reviewed daily and lifted as soon as it is safe. Thank you for your understanding as we try to reduce the spread of norovirus in our hospitals.