Table 1.

Clinical characteristics of misclassified patients with AL and patients with MM


Misclassified patients





29-gene subset
12-gene subset
Light chain isotype
BMPC, %
Hb, g/dL
Serum M-spike, g/dL
Lytic bone lesions
AL-1   NM   κ   3   10.4   Negative   Negative  
AL-2   NM   λ   16   13.6   Negative   Negative  
AL-3   AL-3   λ   25   11.2   Negative   Negative  
AL-4   NM   λ   17   11.8   Negative   Negative  
AL-5   NM   λ   9   7.7   1.9   Negative  
ND   AL-6  λ   13   10.7   1.0   Negative  
ND   AL-7  λ   11.6   13.2   2.2   Negative  
MM-1   MM-1   λ   31   12.0   3.3   Negative  
MM-2   MM-2   λ   30   11.3   Hypogamma*  Negative  
MM-3   NM   λ   38   9.5   1.2   Positive  
MM-4   NM   λ   42   8.5   0.4   Positive  
MM-5   NM   λ   25   9.7   0.4   Positive  
NM   MM-6   κ   24   12   2.1   Negative  
ND
 
MM-7
 
κ
 
5.4
 
11
 
0.6
 
Positive
 

Misclassified patients





29-gene subset
12-gene subset
Light chain isotype
BMPC, %
Hb, g/dL
Serum M-spike, g/dL
Lytic bone lesions
AL-1   NM   κ   3   10.4   Negative   Negative  
AL-2   NM   λ   16   13.6   Negative   Negative  
AL-3   AL-3   λ   25   11.2   Negative   Negative  
AL-4   NM   λ   17   11.8   Negative   Negative  
AL-5   NM   λ   9   7.7   1.9   Negative  
ND   AL-6  λ   13   10.7   1.0   Negative  
ND   AL-7  λ   11.6   13.2   2.2   Negative  
MM-1   MM-1   λ   31   12.0   3.3   Negative  
MM-2   MM-2   λ   30   11.3   Hypogamma*  Negative  
MM-3   NM   λ   38   9.5   1.2   Positive  
MM-4   NM   λ   42   8.5   0.4   Positive  
MM-5   NM   λ   25   9.7   0.4   Positive  
NM   MM-6   κ   24   12   2.1   Negative  
ND
 
MM-7
 
κ
 
5.4
 
11
 
0.6
 
Positive
 

The major clinical features of the misclassified patients with AL and patients with MM in Figure 1A and Figure 3 with respect to light chain isotype, bone marrow plasma cells (BMPCs), anemia, serum M-protein level, and lytic bone lesions are recorded.

NM indicates not misclassified; ND, not done.

*

Urine M-spike = 3.8 g/24 hours

Patients misclassified in independent validation analysis

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