A Case of Uncorrected Tetralogy of Fallot Undiagnosed Until Adulthood and Presenting With Polycythemia

Congenital heart defects with right-to-left shunt are one of the hypoxia-related causes of acquired secondary polycythemia (SP). Tetralogy of Fallot (ToF) is the most common congenital cyanotic heart disease in children. Cases of uncorrected ToF in adult ages are rare. This paper reports a woman detected with elevated hemoglobin level during routine tests performed for infertility therapy and subsequently diagnosed SP with related ToF.