Extractable Nuclear Antigen

Sample type: Serum

Test name: Extractable Nuclear Antigen a.k.a. ENA

Special precautions & notes: Major associations and frequencies are: Ro (SSA) - SLE 30%; Sjogren's60-70%; MCTD 5-15%, La (SSB) - SLE 15%; Sjogren's 45-60%, Sm – SLE 30% (said to be pathognomic), U1 – RNP SLE 35%; MCTD>95%, Jo-1 - Dermato/polymyositis 25%, Scl-70 - Systemic sclerosis 20-30%; CREST 13%

Container: Serum (Gold top)

Ideal volume (mL): 2 mL

Referred outside NBT for analysis? No

Discipline: Immunology

Turnaround time: 7 days