“Engagement ring” image conveys regrettable outcome for aged patients with non‐small cell lung cancer

A 92-year-old woman was referred to our hospital from a local nursing home because of a tonic-clonic seizure. Esophagogastroduodenoscopy had been performed at another clinic two months earlier after the patient had complained of appetite loss and a small bump on her forehead. No abnormal findings were observed and the cause of her bump was concluded as an accident. Thus, further examination was not planned. Head computed tomography (CT) imaging on admission revealed an irregular-shaped tumor on the frontal bone invading into cranial dura mater (Fig 1). A hilar mass with pulmonary atelectasis in the left upper division bronchus was also observed on chest CT (Fig 2). The cause of the seizure was immediately proven to be symptomatic epilepsy as a result of brain invasion from skull bone metastasis of non-small cell lung cancer, which is considered a rare condition. Daily administration of levetiracetam (1000 mg) was initiated to control symptoms and the epilepsy was relieved. Unfortunately only digestive tract disease was excluded after further examination when the patient complained of appetite loss. It is regrettable that a protruding bump on her forehead was misdiagnosed as mere swelling caused by an accident without further radiological examination using magnetic resonance imaging or CT. As evidenced by our case in which the patient’s diagnosis was overlooked, current Japanese public health administration