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How Post PPV and ET Differ from Primary Myelofibrosis

Leuk Res; 2017 Jun 2; Masarova, Bose, Daver et al

Characteristics of post-polycythemia vera (PPV) and post-essential thrombocythemia (PET) myelofibrosis (MF) are very similar to primary MF (PMF), but outcomes differ, according to a study involving 755 individuals.

All participants had PMF and were referred to a single institution between 1984 and 2013. A subset had either PPV-MF (n=181) or PET-MF (n=163). Investigators compared clinical characteristics and outcomes. Among the results:

  • At a median follow-up of 31 months, 56% of patients had died.
  • Leukocytosis and systemic symptoms was highest in those with PPV-MF.
  • Thrombocytopenia was highest in patients with PMF and PPV-MF.
  • Median overall survival was 7 months in patients with PET-MF; it exceeded 40 months in the other 2 conditions.
  • Higher age, anemia, systemic symptoms, thrombocytopenia, and high peripheral blasts predicted inferior overall survival in PMF.
  • Age, anemia, and systemic symptoms predicted such for PPV-MF.
  • Anemia, peripheral blasts, and thrombocytopenia predicted it in PET-MF.


Masarova L, Bose P, Daver N, et al. Patients with post-essential thrombocythemia and post-polycythemia vera differ from patients with primary myelofibrosis. Leuk Res. 2017;59:110-116. doi:10.1016/j.leukres.2017.06.001.