Diaphragmatic injuries, which can be seen after penetrating thoracic traumas, have some difficulties in diagnosis. Undiagnosed small diaphragmatic lacerations may lead to serious health problems. This study aims to evaluate the role of VATS (Video Assisted Thoracoscopic Surgery) in the diagnosis and treatment of diaphragmatic injuries after penetrating thoracic traumas. Among 268 penetrating thoracic trauma patients, we retrospectively evaluated a total of 22 patients performed VATS due to

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... cted diaphragmatic injury in our department between June 2008 and June 2018. Twenty (91%) patients were male, and two (9%) patients were female with a mean age of 28.01±6.4 (18-42) years. In 11 (50%) patients, VATS was performed on the right side and the others on the left side according to the penetrating area of trauma. In 10 (45%) patients, diaphragmatic laceration was detected and was repaired. In six cases (27%) in which diaphragmatic laceration detected with VATS, preoperative traumatic pathologies were detected radiologically. The missed injury rate was 18%. VATS had a specificity, sensitivity, positive predictive value and negative predictive value of 75%, 71.5%, 60% and 83.3%, respectively. There was no significant statistical difference between types of penetrating trauma, ages and gender of cases (p>0.05). No complication was detected during the mean follow up period of 36.2±9.3 (range 9-62) months. Our opinion is that VATS is important and feasible in hemodynamically stable patients with suspected isolated diaphragmatic laceration after penetrating thoracic trauma that cannot be determined by radiologically.