“…Systemic capillary leak syndrome (SCLS), which is characterized by hypovolemia, hypotension, and edema, has an unknown etiology ( 1 ). A 35-year-old woman who had been diagnosed with SCLS 4 years ago ( 2 ) developed decreased consciousness and was rushed to the emergency room 10 hours after developing a fever and tachycardia. Brain magnetic resonance imaging (MRI) revealed a high-luminance region at the center of the cortex on diffusion-weighted ( Picture , left) and T2 fluid-attenuated inversion recovery imaging ( Picture , right).…”