Table 1 Patients’ characteristics (n = 25)

Male/Female

16/9

Age at disease onset (years)

63 (54–72)

Diag delay (months)

25 (13–67)

Rash

25 (100)

Monoclonal component

24 (100)

 IgMκ

19 (76)

 IgMκ+Mλ

2 (8)

 IgMκ+Gκ

1 (4)

 IgMλ

1 (4)

 IgGλ

2 (8)

Rheumatic

21 (88)

 Joint/bone pain

18 (75)

 Abnormal imaging

19 (79)

Fatigue

18 (75)

Fever

15 (63)

Weight loss

14 (58)

Lymphadenopathy

7 (29)

CRP (mg/L)

80 (50–134)

Hemoglobin (g/dL)

11,4 (3, 8–13)

Platelet (G/L)

375 (294–468)

Leucocytes (G/L)

10,6 (1, 8–14)