[Myeloproliferative syndrome].

Division of myeloproliferative syndrome is recommended based on 195 observer cases: A) Secondary myeloproliferative syndrome usually accompanies marrow carcinosis. It is characterized by non-destructive embryonal-type myeloproliferation occurring even outside the marrow excepting lymph nodes as a rule. There are neither specific changes in karyogram nor in alkaline phosphatase positivity.