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PEV is one of the most common deformities in the foot. The incidence of PEV varies between communities and many theories about its etiology have been proposed. In this study, we aimed to share our experience with the incidence and etiology of PEV in the neonatal intensive care unit of a tertiary hospital. 3658 patients who were followed up in a tertiary neonatal intensive care unit from 2014 to 2017 were included in the study. Data on the number and etiology of newborns with PEV deformity were obtained from the automation records of our hospital. PEV deformity was diagnosed in 32 (0.87%) of 3658 babies treated in the neonatal intensive care unit over a period of 3 years. Of these 32 patients, 18 (56.25%) were bilateral, and 14 (43.75%) unilateral PEV. Two (6.25%) of our patients had a positive family history. While 23(71.87%)) of our patients were delivered by cesarean, 9 (28,1%) of our patients were born normally. Considering birth weights, the number of babies born under 2500 grams was 7 (21.8%), and the number of babies born above 2500 grams was 25 (78.1%). Considering the data we obtained at the end of the study, the incidence of PEV was lower than in the literature. In fact, our hypothesis before starting the study was that the incidence of PEV was higher in the neonatal intensive care unit. Although the frequency of PEV is known to vary between populations, the etiology of PEV is not fully known. We believe that future studies (such as genetic studies) will be more beneficial to science than classical knowledge about PEV etiology. [Med-Science 2020; 9(3.000): 556-9]