The focal hepatic hot spot sign appears as an area of increased radiopharmaceutical uptake of the quadrate lobe of the liver in the arteial an veinous phase. This sign seen on CT is due to obstruction of the superior vena cava and portosystemic venous shunt between the superior vena cava and the left portal vein via the thoracic and internal para-umbilical veins.
An 80-year-old man with chronic hypertension was admitted to the emergency department with consciousness disorders. The evolution was marked by a rapid worsening of his neurological condition. The patient was intubated and ventilated. The biological check-up revealed a blood glucose level of 0.2g/l. A brain scan was performed which was without abnormality. Two days after the normalization of the blood sugar level, the patient presented a late awakening. A brain MRI was performed which showed bilateral fronto-parietal laminar cortical areas in T2, Flair and diffusion hypersignal, T1 iso signal, and no hyposignal on T2 gradient echo sequence (Figure 1). The diagnostic of Cortical Laminar Necrosis was retained.
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