A Case of Relapsing Polychondritis Initiating with Unexplained Fever

Table 1

Laboratory findings on admission.

Peripheral blood
Red blood cells	358 × 10^4/μL
Hemoglobin	11.1 g/dL
Hematocrit	33.4%
White blood cells	10700/μL
Neutrophil	80.0%
Monocyte	5.0%
Lymphocyte	15.0%
Platelet	41.7 × 10^4/μL
Blood chemistry
Total protein	7.3 g/dL
Total bilirubin	0.5 mg/dL
Glutamic-oxaloacetic transaminase	19 IU/L (7–33)
Glutamic-pyruvic transaminase	26 IU/L (5–30)
Lactate dehydrogenase	139 IU/L (119–229)
Alkaline phosphatase	545 IU/L (80–250)
Gamma-glutamyl transpeptidase	109 IU/L (5–55)
Creatinine kinase	24 IU/L (60–160)
Total cholesterol	201 mg/dL
Blood urea nitrogen	13.5 mg/dL
Creatinine	0.5 mg/dL
Alb	3.2 g/dL
Na	138 mEq/L
K	3.9 mEq/L
Cl	101 mEq/L
Serological tests
C-reactive protein	11.64 mg/dL (<0.30)
Erythrocyte sedimentation rate	72.0 mm/hr
Ferritin	548 ng/mL (<170)
C3	161 mg/dL (86–160)
C4	32 mg/dL (17–45)
ANA	(—) (<40)
Anti-CCP Ab	<0.6 U/mL (<4.5)
MPO-ANCA	<1.0 U/mL
RR3-ANCA	<1.0 U/mL
Type II collagen Ab	15.0 EU/mL (<25.0)
IgG	1580 mg/dL (900–2000)
MMP-3	65.1 ng/mL (<59.7)
Microbiological test
HCV-Ab	(—)
HBsAg	(—)
CMV-antigenemia	(—)
Blood culture	(—)
β-D-Glucan	<3.4 pg/mL
Urinalysis	Normal

ANA: antinuclear antibody, ANCA: antineutrophil cytoplasmic antibody, CMV: cytomegalovirus, HBsAg: hepatitis B surface antigen, HCV: hepatitis C virus, MMP-3: matrix metalloproteinase-3, MPO: myeloperoxidase, RF: rheumatoid factor, and RR3: proteinase 3.