Table 2.

Genotyping of the Val617Phe (1849G>T) JAK2 mutation in blood mononuclear cells




JAK2 genotype

No. of patients
Tnull; wild type
Tminor; mutant allele up to 50%
Tmajor; mutant allele more than 50%
Polycythemia vera, no. (%)   60   13 (21.7)   35 (58.3)   12 (20)  
Essential thrombocythemia, no. (%)   61   30 (49.2)   26 (42.6)   5 (8.2)  
Myelofibrosis with myeloid metaplasia, no. (%)   8   2 (25)   4 (50)   2 (25)  
Chronic myeloid leukemia, no. (%)   8   8 (100)   0 (0)   0 (0)  
Systemic mastocytosis, no. (%)   1   1 (100)   0 (0)   0 (0)  
Chronic myelomonocytic leukemia, no. (%)   1   1 (100)   0 (0)   0 (0)  
Healthy relatives with EEC, no. (%)   37   35 (94.6)   2 (5.4)   0 (0)  
Healthy relatives, no. (%)
 
201
 
200 (99.5)
 
1 (0.5)
 
0 (0)
 



JAK2 genotype

No. of patients
Tnull; wild type
Tminor; mutant allele up to 50%
Tmajor; mutant allele more than 50%
Polycythemia vera, no. (%)   60   13 (21.7)   35 (58.3)   12 (20)  
Essential thrombocythemia, no. (%)   61   30 (49.2)   26 (42.6)   5 (8.2)  
Myelofibrosis with myeloid metaplasia, no. (%)   8   2 (25)   4 (50)   2 (25)  
Chronic myeloid leukemia, no. (%)   8   8 (100)   0 (0)   0 (0)  
Systemic mastocytosis, no. (%)   1   1 (100)   0 (0)   0 (0)  
Chronic myelomonocytic leukemia, no. (%)   1   1 (100)   0 (0)   0 (0)  
Healthy relatives with EEC, no. (%)   37   35 (94.6)   2 (5.4)   0 (0)  
Healthy relatives, no. (%)
 
201
 
200 (99.5)
 
1 (0.5)
 
0 (0)
 
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