Table 2.

Serological findings.

Case	Sex	RF (IU/ml)	Anti-CCP (U/ml)	Anti-SS-A (U/ml)	Anti-SS-B (U/ml)	ANA (fold)	ANCA (IU/ml)
1	M	55	424.1	113.6	–	80	–
2	F	168.1	59.2	–	–	1280	–
3	F	260.9	84.1	–	–	80	–
4	F	1213.5	86.7	–	–	160	–

M = male, F = female, RF = rheumatoid factor, CCP = cyclic citrullinated peptide, SS = Sjögren's syndrome, ANA = antinuclear antibody, ANCA = anti-neutrophil cytoplasmic antibody, - = negative Blood tests were performed at the onset of autoimmune-associated ulcerative keratitis in cases 1 and 2, and at the onset of herpes simplex keratitis in cases 3 and 4.