Table 1 Demographic and blood parameters of the patient

Age

63

year

Hemoglobin

80

g/L

Platelet count

256

85–303 × 10⁹/L

White blood cell count

4.89

3.97–9.15 × 10⁹/L

Serum total protein

45

60–83 g/L

Albumin

24

35–55 g/L

IgG

503

751–1560 mg/dl

IgM

984

46–304 mg/dl

Anticardiolipin antibody (IgM)

69.8

<12 MPL/ml

Anticardiolipin antibody (IgG)

<2

<12 GPL/ml

Anti-β2GP1 antibody

11.2

<20.0 RU/ml

Lupus anticoagulant

2.13

<1.2

M paraprotein (IgMκ)

2.7

g/L

Activated partial thromboplastin time

114.7

27.2–41.0 s

Prothrombin time

23.0

10.0–16.0 s

D-dimer

1.04

<0.55 mg/L

Bone marrow (FCM)

 CD19⁺ cell

11.1

%

 CD19⁺CD20⁺ cell

98.2

%

 CD19⁺CD38⁺ cell

94.5

%

 CD19⁺CD138⁺ cell

<0.1

%

 CD19⁺cyt-Igk⁺ cell

94.2

%

 CD19⁺cyt-Igλ⁺ cell

4.4

%