The authors report a clinical case of a 15-year-old female patient with a giant pulmonary hydatid cyst that was diagnosedonly after rupture and successfully operated. The patient suff ered a minor trauma during gym class, and a short time after thetrauma she vomited profusely with a large amount of colorless fl uid. Subsequently, her condition worsened, with fatigue, severe pain in the right hemithorax, severe cough with poor sputum, dyspnea and unspoken hemoptysis, so she was admitted to the hospital. After admission, a CT scan confi rmed the diagnosis of pulmonary hydatid cyst complicated by endobronchial rupture with subtotal involvement of the right lower lobe. The patient underwent surgery by right lateroposterior thoracotomy. After removal of the parasitic larvocyst, the remaining postechinococcectomy cavity was padded. In the postoperative period, partial insuffi ciency of the padding sutures was observed, which was treated conservatively.The authors conclude that echinococcectomy with silver nitrate treatment of the residual cavity and fi lling with superimposedbursae in giant pulmonary hydatid cyst complicated by endobronchial rupture is an eff ective technical procedure that allows toreduce postoperative morbidity and hospitalization time in this serious complication.