Tracheal Duplication Cyst Presenting as Chest Pain.

Tracheal duplication cysts (TDCs) are congenital malformations that are rarely diagnosed in adulthood. The authors present a case of a 43-year-old female with no known comorbidities with a two-year history of chest and upper abdominal pain. Her previous imaging on an outpatient basis was suggestive of an esophageal duplication cyst, and she was lost to follow-up until the current admission. She gave a past surgical history of video-assisted thoracoscopic surgery for a "cyst" excision, with the relevant details unavailable. On examination, the findings were unremarkable. Repeat imaging was suggestive of an esophageal duplication cyst with no change in dimensions. She underwent a right-sided elective thoracotomy and cyst excision. Intraoperatively, a smooth globular mass was visualized next to the esophagus below the level of the carina. The biopsy revealed a TDC. The patient had an uneventful postoperative period and was asymptomatic on follow-up after three months. TDCs pose a diagnostic challenge as they can only be diagnosed by imaging and histopathology. However, when the imaging is atypical, histopathology clinches the diagnosis. Complete surgical excision is recommended for symptomatic patients after ruling out malignancy. Recurrence of the lesion must be considered in patients such as ours. Our case emphasizes the consideration of TDCs in the differential diagnosis and advocates the importance of complete surgical resection to prevent a recurrence.