Authors present case-reviews of three patients, 33 years old, with finding of pulmonary sequestration and indicated for surgical therapy, it means lung resection. It was an accidental finding in all three case-reviews. Standard examination methods in pneumology as a X-ray of the chest, bronchoscopy with cytology, spirometry and chest CT, were used for diagnosis. If the suspicion of pulmonary sequestration was expressed from chest CT scans, then CT angiography was indicated. The patients underwent surgery revision, ligation of atypically leading artery followed by lung resection with pulmonary seqestration. In the postoperative course there were no complications.