Migraine-like headache with aura induced by a small infarct in the parieto-occipital cortex: A case report.

A 56-year-old right-handed man was referred to our hospital for evaluation of sudden-onset transient quadrantanopia, which was followed by throbbing headache consistent with migraine with aura (MA). Magnetic resonance imaging (MRI) of the right parieto-occipital cortex on admission showed a hyperintense region on diffusion-weighted imaging, which disappeared 7 days later. A small cortical infarct in the parieto-occipital cortex can cause MA-like headache, and the present infarct lesion was only detectable on MRI during the acute phase. Performing MRI for patients with suspected acute MA might help identify the cause of MA-like headache and ensure appropriate management of patients.

A Case of Paraneoplastic Neurological Syndrome Associated with Breast Cancer Detected while Searching for the Cause of Involuntary Movement.

Our case involved a 66-year-old woman who noticed progressive asymmetric involuntary movement, difficulty speaking, and difficulty swallowing. The patient fractured her femur due to a lower extremity involuntary movement while walking. During the course of her treatment for the fracture, her neurological symptoms worsened. Approximately 2 months after becoming aware of her symptoms, she visited our clinic for evaluation of difficulty with unassisted walking and weight loss due to dysphagia. To identify the cause of her neurological symptoms, hematological examination, brain magnetic resonance imaging, single-photon emission computed tomography for cerebral blood flow, electroencephalography, and a somatosensory evoked potential test were conducted. Although the cause of her neurological symptoms could not be determined, computed tomography revealed the presence of breast cancer, which led us to suspect paraneoplastic neurological syndrome (PNS). After breast cancer treatment, her neurological symptoms improved simultaneously. Therefore, the patient was retrospectively diagnosed with PNS. We report a case of PNS whose neurological symptoms followed a subacute course and were relieved after breast cancer treatment.

A case of Cefepime encephalopathy, being difficult to distinguish from non-convulsive status epilepticus during the treatment of bacterial meningitis.

A 64-year-old man with fever, appetite loss, and pain in the back of the neck visited our hospital. We diagnosed him as having bacterial meningitis because of pleocytosis of the cerebrospinal fluid, and started treatment with antibiotics. Multiple cerebral infarcts were found on brain MRI. We suspected that the origin of the bacterial meningitis was infective endocarditis, and administered Cefepime and Gentamicin according to the guidelines for treatment of infective endocarditis. Three days later, he became drowsy and had myoclonus and flapping of the extremities. An electroencephalograph showed generalized periodic discharge and a triphasic wave pattern. We thought that the cause of disturbance in consciousness was Cefepime-induced encephalopathy, and stopped administration of Cefepime. A few days later, he became clear, and the myoclonus and flapping disappeared. It was difficult to distinguish between non-convulsive status epilepticus and Cefepime-induced encephalopathy. However, since stopping Cefepime treatment had made the patient clear, we diagnosed his condition as Cefepime-induced encephalopathy, which often occurs in patients with renal or liver dysfunction, or in brain infarction or meningitis, which results in blood-brain barrier disruption. Thus, care should be taken when administering Cefepime to such patients.