Trilogy of Fallot is a medical term that refers to a combination of three congenital heart defects: ventricular septal defect, pulmonary stenosis, and right ventricular hypertrophy. However, there are alternative terms used to describe this condition, including Tetralogy of Fallot, Fallot's tetrad, and Fallot's anomaly. Although these terms have slight differences, they all refer to the same heart defects that result in insufficient oxygenation of blood, leading to cyanosis or bluish discoloration of the skin. It is crucial to distinguish these synonyms for the Trilogy of Fallot to prevent confusion and ensure proper diagnosis and treatment of this condition.