Table 2. Rheumatological work-up investigations.

ANA: antinuclear antibody, RA: rheumatoid arthritis, ANCA: anti-neutrophil cytoplasmic antibody, Anti-CCP: anti-cyclic citrullinated peptide.

Name of the test	Case1	Case2	Case 3	Normal range
ANA	1:1280	1:320	1: 320	<1:80
Anti-ds DNA	102.09	56.4	13.72	<36
Anti smith antoibody	Not done	>400	Not done	<7 unit/ml
Serum C3	0.844	1.02	1.32	0.90-1.8 g/L
Serum C4	0.131	0.145	0.11	0.10-0.40 g/L
RA	8	128	8	<10 IU/mL
Anti-CCP	10	1.48	10	<50U/mL
c-ANCA	3.58	1.5	1.4	<5U/ml
p-ANCA	2.50	1.4	1.4	<5U/ml
Lupus Anti-coagulant	1.18	1.18	1.18	0-1.20
Anti-cardiolipin Ab   Ig M and Ig G	4.6 and 5.1	4.5 and 5.2	4.5 and 5	<40 GPLU /ml
Anti-beta two glycoprotein IgM and Ig G	2.8 and 3.9	5 and5.4	3 and 5	<40 SGU U/ml