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Background: Double‑lumen tubes (DLTs) are commonly used for differential pulmonary ventilation during thoracic surgery. Few reports exist on subglottic stenosis among patients who underwent surgery involving DLTs; we lack immediate postoperative period documentation leading up to the onset and subsequent recovery of subglottic stenosis. Herein, we present a case of a 75-year-old woman successfully treated for subglottic stenosis after DLT., Case Description: A 75-year-old woman presented to our hospital with an abnormal chest shadow, which was identified during a medical examination. Chest computed tomography revealed an anterior mediastinal mass with a poor contrast effect measuring 6.0 cm × 3.1 cm × 1.9 cm, which grew from 2.2 to 6.0 cm over 21 months. Low and high signals were detected on T1- and T2-weighted thoracic magnetic resonance imaging, respectively. Concordantly, a thymic cyst was suspected. The patient underwent robotic-assisted thoracoscopic resection via the right lateral approach. A 35-Fr left-sided DLT was used for intubation and differential lung ventilation. Hoarseness and stridor were observed on postoperative day (POD) 1. Laryngoscopy showed submucosal hemorrhage around the vocal cords and mild subglottic stenosis; however, there was no arytenoid dislocation or findings necessitating emergency treatment. On POD 4, her stridor became more severe and laryngoscopy was re-performed and revealed subglottic stenosis progression prompting emergency tracheotomy. The stenosis further progressed, and almost complete airway obstruction was observed on POD 7. By POD 9, partially improving the subglottic stenosis, thereafter the subglottic stenosis was almost completely alleviated by POD 12. The tracheal cannula was removed on POD 22. Trachea-cutaneous fistula closure was performed on POD 35, and she was discharged on POD 42, remaining well. The pathological examination of the anterior mediastinal tumor confirmed the diagnosis of thymic cyst., Conclusions: Airway obstruction owing to subglottic stenosis may occur several days post-surgery with a DLT. Prompt tracheostomy is recommended to prevent complete airway obstruction in patients with progressive subglottic stenosis., Competing Interests: Conflicts of Interest: The authors have completed the ICMJE uniform disclosure form (available at https://acr.amegroups.com/article/view/10.21037/acr-23-92/coif). The authors have no conflicts of interest to declare., (2024 AME Case Reports. All rights reserved.)

Background: Rupture of a thymoma is rare, and due to its rarity, the mechanism of rupture remains unclear. Here we report a case of a ruptured thymoma that ruptured due to an increase in the intratumoral pressure caused by recurrent hemorrhaging., Case Description: A 70-year-old woman presented 2 days prior persistent right chest and shoulder pain. A chest computed tomography (CT) scan revealed the presence of a mass occupying the anterior mediastinum and a right pleural effusion. It was diagnosed as an anterior mediastinum tumor. The increase in the levels of inflammatory markers and tumor necrosis observed on CT were suggestive of infection. As the general status of the patient was stable and she initially received antibiotic medical therapy, an improvement in the inflammatory marker levels was observed with antibiotic therapy. A surgical resection was performed 10 days after admission. Median sternotomy revealed a tumor extending from the mediastinum to the right thoracic cavity. Since the adhesion was strong and tumor invasion was suspected, the tumor was completely resected by combining a partial resection of the right middle and lower lobes with the pericardium. Pathological examination revealed that the tumor was a type B2 thymoma with fibrosis, necrosis, hemosiderosis, and hemorrhaging, suggesting recurrent hemorrhaging within the tumor., Conclusions: Based on the findings of our case, recurrent hemorrhaging within the tumor led to an increase in the intratumoral pressure and chronic inflammation and necrosis weakened the tumor wall. These changes contributed to the subsequent rupture., Competing Interests: Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://acr.amegroups.com/article/view/10.21037/acr-23-44/coif). The authors have no conflicts of interest to declare., (2023 AME Case Reports. All rights reserved.)

Competing Interests: Conflicts of Interest: The authors have no conflicts of interest to declare.

Competing Interests: Conflicts of Interest: The authors have no conflicts of interest to declare.

A 61-year-old man was admitted to the emergency room because of sudden right chest pain and dyspnea. A chest X-ray and chest computed tomography (CT) revealed severe right pneumothorax with massive pleural effusion. Chest drainage was performed and approximately 1.2 L of pleural fluid was removed. Hemothorax was suspected based on the imaging findings, but the pleural effusion was serous. Active air leakage continued for 4 days after chest drainage, thus we decided to surgically control the air leakage and performed video-assisted surgery. A thoracoscopic examination revealed a large number of nodule parietal pleural and epiphrenic pleural nodule lesions. A pathological examination of frozen sections of the nodules indicated malignant pleural mesothelioma (MPM). Continuous air leakage was observed from the pleural surface of the right lower lobe. The air leak developed from the visceral pleura and the point of visceral pleura had a normal macroscopic appearance. The patient was treated with wedge lung resection and pleurodesis., Competing Interests: Conflicts of Interest: The authors have no conflicts of interest to declare.