Elevated Erythrocyte Count (Erythrocytosis/Polycythemia): Causes, Diagnosis, and Relationship with MCV and Liver Enzymes
Introduction Erythrocytes, or red blood cells, are essential for transporting oxygen throughout the body. An increased erythrocyte count —known as erythrocytosis or polycythemia —may be harmless in some cases but can also indicate underlying medical conditions. This condition often presents with symptoms such as headaches, dizziness , or an increased risk of thrombosis , and therefore requires thorough evaluation. This article explains the possible causes of erythrocytosis in detail, discusses its relationship to other laboratory parameters such as MCV (mean corpuscular volume) and liver enzyme levels , and considers the potential role of medications like hydrocortisone . 1. What is Erythrocytosis? Erythrocytosis refers to an increased number of red blood cells in the bloodstream . This leads to increased blood viscosity , which can elevate the risk of vascular blockages such as thrombosis, embolism, or stroke . Normal values: Men: 4.3–5.9 million/µl Women: 4.1–5.1 million...