A 22-year-old female visited hospital for a routine checkup, and a mass was incidentally found on chest radiography. She denied any medical or family history and did not complain of any symptoms. Contrast-enhanced chest computed tomography depicted a 2.4 cm, well-defined ovoid thin-walled cyst in the left paravertebral space adjacent to the tenth vertebra

A 22-year-old female visited hospital for a routine checkup, and a mass was incidentally found on chest radiography. She denied any medical or family history and did not complain of any symptoms. Contrast-enhanced chest computed tomography depicted a 2.4 cm, well-defined ovoid thin-walled cyst in the left paravertebral space adjacent to the tenth vertebra