Posibleng Mga Sanhi para sa Pagtaas ng Erythrocytes Chronic na Obstructive Pulmonary Disease Dehydration Hypoxia Malalang Pancreatitis Renal Cell Carcinoma Myeloproliferative Disease Polycythemia Vera Cushing's Disease Erythrocytosis Congenital Heart Disease Metastatic Renal Cell Carcinoma Antipsychotic Agent Namamanang Elliptocytosis Namamanang Spherocytosis Malalang Myelocytic Leukemia Malalang Pyelonephritis Malalang Leukemia Clostridium na Impeksyon Bahagyang Pyloric Obstruction Malalang Myeloid Leukemia na may kaugnayan sa Myelodysplasia na mga Pagbabago Kakulangan ng Folic Acid Malubhang Aplastic Anemia Dislokasyon ng Baywang Kakulangan ng Riboflavin