[Thoracoscopically removed thoracolithiasis].

Thoracolithiasis is a rare condition with only 16 cases of surgically removed nodules reported in the literature in Japan. We report an additional thoracoscopically removed case. A 62-year-old man was pointed out an abnormal shadow behind the left diaphragmatic dome on a routine health examination. Computed tomography (CT) revealed a round mass lesion with calcification, about 11 mm in diameter, in the left thorax. Video-assisted thoracic surgery (VATS) was performed and a white 11 mm completely free nodule in the left pleural cavity was removed. Pathological findings revealed necrotic fat tissue in the center surrounded by hyalinized fibrous tissue, being consistent with thoracolithiasis.