Hyperhomocysteinemia is a risk for thrombosis. Thrombosis is more frequent in myeloproliferative neoplasms (MPNs) than the normal population. In this study, we investigated the thrombosis incidence, the effects of plasma homocysteine levels on thrombosis, and the correlations between folate, cobalamin, pyridoxine and homocysteine levels in MPNs, and to compare these results with the healthy controls.

Thirty-one new or formerly diagnosed MPN patients who consecutively visitted our outpatient clinic, as well as 40 age and sex matched healthy controls were enrolled in this study.

Inclusion Criteria:

Adult MPN patients and healthy controls who gave a written consent were included in the study.

Exclusion Criteria:

Exclusion criteria included not giving a written consent and using medications without an indication which may have an effect on plasma homocysteine and vitamin levels.

Between January and June 2003, thirty-one new or formerly diagnosed MPN patients who consecutively visitted our clinic, as well as 40 age and sex matched healthy controls were enrolled in this study.