Table 2. Myeloproliferative neoplasm-associated mutations in 38 patients diagnosed as having chronic myelomonocytic leukemia according to the 2008 WHO classification.

Mutations	Test ordered at diagnosis (%)	Positive/Tested (%)
JAK2 V617F	19/38 (50)	7/26 (27)
JAK2 exon 12	1/38 (3)	0/12 (0)
CALR	4/38 (11)	0/15 (0)
MPL	4/38 (11)	1/14 (7)