[Hematological disorder caused by a giant myoma of the uterus].

OBJECTIVES: Polycythaemia means an increase in the number of red blood cells and usually a corresponding increase in the haematocrit and in the quantity of haemoglobin. Regarding etiology, primary and secondary forms of polycythaemia can be distinguished. The primary form--polycythaemia vera--is caused by autonomous erythroblastic hyperplasia. Secondary polycythaemia--erythrocythosis--may arise as a consequence of erythropoietin (EP) overproduction due to tissue hypoxia. These changes may stimulate the EP synthesis in the kidneys. EP may also be produced in metaplastic cells.

STUDY DESIGN: A 59-year-old woman was admitted to the Clinic of Haematology of the Wrocław Medical University with a 10-years' history of significant increase in HB, VPRC and RBC. Physical examination showed an obvious plethora and a large intra-abdominal painless tumour. Laboratory data revealed increases in Hb, VPRC, RBC and EP. A bone marrow aspiration was normal. During surgery, a large leiomyoma of the uterus was found and a total hysterectomy was performed. Pathological examination showed the tumour to be fibroleiomyoma. 4 weeks after surgery Hb, VPRC, RBC and EP, all returned to normal levels.

RESULTS: Excluding the effect of the renal compression, it can be concluded that erythropoietin secreted by the the tumour caused the secondary haematological changes.