Back to Library

Polycythaemia, also termed erythrocytosis, is characterized by an absolute increase in the mass of circulating red cells, detectable by a rise in the haematocrit.

Secondary polycythaemia occurs in conditions that give rise to arterial hypoxia, the two main causes being chronic lung disease and cyanotic congenital heart disease.
In these circumstances, hypoxia stimulates expansion of red cell mass.
A similar phenomenon is seen in people who live at high altitudes, such as in the Andes. Uncommonly, abnormal secretion of erythropoietin causes polycythemia, e.g. in renal disease or cerebral haemangioblastoma.

Primary polycythaemia occurs in a condition termed polycythaemia rubra vera, which
is one of the myeloproliferative disorders.
At a haematocrit above 50%, hyperviscosity of blood predisposes to vascular thrombosis,
e.g. causing cerebral infarction.
Interested in translating health topics to somali language!

We give here simplified and accurate information about the disease Info@somalidoc.com

DISCLAIMER: This website is provided for general information and it's run by medical students for medical students only and is not a substitute for professional medical advice. We are not responsible or liable for any diagnosis or action made by a user based on the content of this website. We are not liable for the contents of any external websites listed, nor do we endorse any commercial product or service mentioned or advised on any of the sites. Always consult your own doctor if you are in any way concerned about your health

Advertising | Conditions of use | Privacy policy | Webmaster
Copyright 2007 [
www.somalidoc.com]. All rights reserved.
Revised: 02-11-2014.