A comprehensive set of auxiliary tests was conducted, including a complete blood count, coagulation profile, D-dimer, FDP, myocardial markers, BNP, thyroid hormones, rheumatism indicators (anti-hemolytic streptococcus, rheumatoid factor, C-reactive protein), immunoglobulins (A, G, M, complement C3, C4), antinuclear antibody and titration tests (ANA), antinuclear antibody spectrum, anti-double-stranded DNA antibody, HIV, syphilis, hepatitis B, glycosylated hemoglobin, urine routine examination, and interleukin 6 (IL-6). Here, IL6 is linked to rheumatic disorder.