7/1/23, 5:02 AM Polycythemia Pathway Feedback Search Clinical Topics Home Findings Polycythemia Polycythemia More common causes Chronic obstructive pulmonary disease Acute erythroblastic leukemia Obstructive sleep apnea Lung cancer Chronic respiratory failure Dehydration Less common causes Renal adenocarcinoma Pulmonary arteriovenous malformations Methemoglobinemia Tumor lysis syndrome Cyanotic heart disease Polycythemia vera Uncommon causes High-oxygen-affinity hemoglobin Chronic altitude sickness https://web.pathway.md/findings/recxzvSiEYieLTp7A 1/2 7/1/23, 5:02 AM Polycythemia Pathway Familial erythrocytosis Pseudopolycythemia https://web.pathway.md/findings/recxzvSiEYieLTp7A 2/2