Bronchogenic Cyst in the Posterior Mediastinum: a Case That Was Difficult to Differentiate from a Neurogenic Tumor

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  • Hayashi Sohei
    Division of Respiratory Surgery, Nihon University School of Medicine
  • Kawachi Riken
    Division of Respiratory Surgery, Nihon University School of Medicine
  • Sato Daisuke
    Division of Respiratory Surgery, Nihon University School of Medicine
  • Sakata Shozo
    Division of Respiratory Surgery, Nihon University School of Medicine
  • Shimamura Mie
    Division of Respiratory Surgery, Nihon University School of Medicine
  • Tsujimura Ryusuke
    Division of Morphological & Functional Pathology, Department of Pathology and Microbiology, Nihon University School of Medicine
  • Masuda Shinobu
    Division of Oncologic Pathology, Department of Pathology and Microbiology, Nihon University School of Medicine
  • Sakurai Hiroyuki
    Division of Respiratory Surgery, Nihon University School of Medicine

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Other Title
  • 後縦隔に発生し，神経原性腫瘍と鑑別が困難であった気管支原性囊胞の1例

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<p>Background. Bronchogenic cysts are commonly located in the middle mediastinum and rarely occur in the posterior mediastinum. We report a case in which a mediastinal bronchogenic cyst required differentiation from a neurogenic tumor. Case. A 40-year-old man was admitted to our hospital with a clearly circumscribed and low-density mass of 3.1 cm in diameter. It was located posterior to the descending aorta and was detected by thoracic CT scan during a medical examination. Four-dimensional (4D) -CT showed that the mass was improperly mobile, which suggested that the tumor was not derived from the visceral pleura or lung, and we preoperatively diagnosed the mass as a posterior mediastinal tumor (e.g., a neurogenic tumor). The lesion was removed by thoracoscopic surgery. The tumor was located near the sympathetic stem and was easily removed, as there was no adhesion or infiltration. The tumor was diagnosed as a bronchogenic cyst based on a postoperative pathological evaluation. Conclusion. It is important to include bronchogenic cysts in the differential diagnosis of any mass in the posterior mediastinum.</p>

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