Background Pulmonary metastasis of scalp angiosarcoma (SA) is a rare, but life-threatening disease, challenging to diagnose and manage. We report two cases of pneumothorax and hemothorax with pathologically proven metastasis of SA in the parietal pleura, which was not predictable from images and difficult to manage. Patient A A 73-year-old man with SA underwent chemoradiotherapy and surgical resection for primary skin lesion, was sent to our department to treat right empyema, which was developed during chest tube drainage for pneumothorax. Computed tomography (CT) showed multiple bullous lesions. We performed repetitive video-assisted thoracoscopic surgery (VATS) for the debridement and hemostasis; however, hemothorax was uncontrollable. The repeated cytology of pleural effusion showed no malignancy. We eventually performed fenestration and metastatic SA was pathologically diagnosed by the biopsy of parietal pleura. The patient developed respiratory failure and uncontrolled anemia, which were fatal. Patient B A 71-year-old man with SA previously treated with chemoradiotherapy was referred to our department for left pneumothorax. CT showed multiple bullous lesions at apex without any changes at parietal pleura. VATS was performed and the apex bullous lesion with air leakage was resected. The parietal pleura showed several dark-red spots and the biopsy was undertaken. The pathological diagnosis was a metastasis of SA along with visceral pleura and parietal pleura. The patient then developed right pneumothorax and left hemopneumothorax. Bilateral pleurodesis was ineffective and the patient died due to deteriorating general condition. Conclusions In patients with a history of SA who develop pneumothorax and hemothorax, metastatic SA to visceral and parietal pleura should be always considered. Surgical biopsy, not cytology, is needed for pathological diagnosis. Lesions in the parietal pleura prior to hemothorax were thoracoscopically observed in one case. Surgeons must recognize that conventional surgical intervention or pleurodesis will have unsatisfactory results.

A 51-year-old man presented to us for potential salvage surgery for local recurrence of a squamous cell carcinoma originating in the left lower lobe after definitive chemoradiotherapy. Salvage sleeve lower lobectomy was initially planned; however, intraoperatively the interlobar pulmonary artery was difficult to separate from the bronchus. To safely spare the upper lobe, we performed ex vivo sleeve lower lobectomy, followed by autotransplantation of the upper lobe. No major postoperative complication was noted and the patient has returned to normal life without recurrence for 9 months.

OBJECTIVES Although lymph node (LN) metastases are not uncommon in thymic carcinomas, preoperative LN evaluation, intraoperative lymph node dissection (LND) and postoperative outcomes remain unknown. The aim of this study was to elucidate the characteristics of and outcomes in patients with thymic carcinomas and thymic neuroendocrine carcinomas undergoing LND. METHODS A retrospective chart review was performed using our multi-institutional database to identify patients who underwent resection and LND for thymic carcinoma or thymic neuroendocrine carcinoma between 1991 and 2018. An enlarged mediastinal LN was defined as having a short-axis diameter >1 cm. We assessed survival outcomes using the Kaplan–Meier analysis. RESULTS N1-level LND was performed in 41 patients (54.6%), N2-level LND in 14 patients (18.7%) and both-level LND in 16 patients (21.3%). Pathological LN metastasis was detected in 20 patients (26.7%) among the 75 patients undergoing LND. There was a significant difference in the number of LN stations (P = 0.015) and metastasis factor (P = 0.0042) between pathologically LN-positive and pathologically LN-negative patients. The sensitivity of enlarged LNs on preoperative computed tomography was 18.2%. There was a tendency towards worse overall survival of pathologically N2-positive patients, although the difference was not statistically significant (P = 0.15). CONCLUSIONS Preoperative CT appears to play a limited role in detecting pathological LN metastases. Our findings suggest that the significance of N1- and N2-level LND should be evaluated in prospective studies to optimize the postoperative management of patients with thymic carcinomas and neuroendocrine carcinomas.

Herein, we describe case studies of two patients who underwent resection of paratracheal middle mediastinal thymic carcinomas. In both patients, complete resection of these masses via right thoracotomy was performed using three dimensional computed tomography. Final pathological diagnoses were thymic squamous cell carcinoma and thymic atypical carcinoid tumor, respectively. Challenges and debates in preoperative, intraoperative, and postoperative management are discussed in this article.