Abstract
Bronchogenic cysts arise from abnormal budding of the ventral diverticulum of the foregut or tracheobronchial tree during embryogenesis, are the most common cystic masses in the mediastinum, and are generally asymptomatic. A spontaneous regression in a mediastinal bronchogenic cyst (MBC) with pneumonia is rare. A 30-year-old male had a tumor shadow in the middle mediastinum. When he visited our hospital, he had a mild fever with coughing and sputum. A chest computed tomography (CT) scan showed a decrease in the tumor size and the existence of right pneumonia. MBC may be involved in the etiology of pneumonia; therefore, bronchogenic cysts need to be resected as soon as possible.
Highlights
A bronchogenic cyst is a relatively rare condition caused by abnormal budding, isolation, and migration of the intrathoracic airway during the fetal period
A chest-enhanced computed tomography (CT) scan taken at our hospital showed spontaneous regression in the tumor size and right intrapulmonary consolidation, which came in contact with the tumor (Fig 2)
Previous studies suggested that mediastinal bronchogenic cyst (MBC) was associated with symptoms such as fever, coughing, chest pain, and dyspnea, all of which are caused by intratumoral infections or the compression of adjacent organs [1, 2]; a decrease in the tumor size of MBC accompanied by pneumonia is very rare
Summary
A bronchogenic cyst is a relatively rare condition caused by abnormal budding, isolation, and migration of the intrathoracic airway during the fetal period. Most bronchogenic cysts in the mediastinum are generally asymptomatic, some cases may be accompanied by symptoms such as fever, coughing, chest pain, or dyspnea. The patient was diagnosed with a middle mediastinal tumor and was referred to our hospital He had a mild fever with coughing with sputum, no other symptoms were observed at the initial visit to. A chest-enhanced CT scan taken at our hospital showed spontaneous regression in the tumor size and right intrapulmonary consolidation, which came in contact with the tumor (Fig 2). After the liquid contents of the tumor had been removed, the wall of the cyst was resected as much as possible. Histopathological findings revealed that the cyst wall was mainly composed of bronchial glands and smooth muscle tissues, with hematoxylin and eosin staining showing that it was lined by ciliated columnar epithelia
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