Penetration of bronchial wall by knot of absorbable monofilament suture

A 75-year-old man underwent thoracoscopic left upper lobectomy for primary lung cancer. Additional ligature plication to the left superior pulmonary vein with absorbable monofilament suture was performed after stapling with an endostapler. Postoperative bronchoscopy revealed penetration of the monofilament thread edge eviscerating across the wall of the left main bronchus. The edge was spontaneously absorbed with no adverse events. Penetration of a thick monofilament thread edge into mediastinal organs should be considered when the thread is located in the mediastinum.