Matsuda E, Okabe K, Takahagi A, Hayashi T, Tanaka T, Sano F, Tao H

We describe an extremely rare case of pulmonary abscess caused by fish bone which stabbed the lung from transesophageal route. A 60-year-old woman referred to our hospital complaining of fever. Three days before, she had swallowing pain while eating the bony parts of a fish. An examination on admission showed that C-reactive protein (CRP) is 9.70 mg/dl. Chest computed tomography (CT)revealed, 4 cm mass shadow in the right upper lobe and fish bone material in the mass shadow. Esophagography showed no abnormal findings. Right upper lobectomy was performed under the diagnosis of pulmonary abscess by fish bone. Post operative course was uneventful. The cause was suspected of migration of a fish bone into the right upper lobe via mediasinum and thoracic cavity from esophagus.