Tetralogy of Fallot in a Two-Month-Old Holstein Calf

In this case report, a case of tetralogy of fallot (ToF) in a two-month-old female, Holstein breed calf was described. Following necropsy examination, all tissue samples were collected and fixed in %10 buffer formalin solution, embedded in paraffin, sectioned at 5 µm and stained routinely with Hematoxylin-Eosin. At necropsy, the heart was enlarged; the pericardium was edematous, opaque and was distended with fluid transudate. In the heart, pulmonary stenosis with a diameter of 1.8 cm, a defect (3 cm in diameter) in the cranial of the interventricular septum, dilatation of the right ventricle and thickening of its wall and right displacement of the aorta on the interventricular septum were observed. According to these findings, the present case was diagnosed as ToF. To the best of our knowledge, this case is the first case of ToF in Turkey.