Table 2. Laboratory panel taken at initial presentation to diagnose underlying systemic disease, including rheumatologic diseases, often associated with EED.

* Includes antibodies to detect previous infection with hepatitis A, hepatitis B, or hepatitis C

** Includes ANCA and proteins myeloperoxidase (MPO) and proteinase 3 (PR3)

EED: erythema elevatum diutinum; ANCA: antineutrophil cytoplasmic antibodies

Laboratory Assessment	Result
Hepatitis panel*	Negative
Antineutrophil cytoplasmic antibodies (ANCA) panel**	Negative
Rheumatoid factor (RF)	Negative
Thyroid stimulating hormone (TSH)	0.51 U/mL (Normal 0.5 to 5.0 mlU/L)
Quantiferon gold	Negative
Serum protein electrophoresis (SPEP)	Normal
Rapid plasma reagin (RPR)	Negative