Severe hypoglycemia may occur as a complication of insulin therapy or as a consequence of accidental or suicidal insulin injections 1 . It may result in a variety of neurological symptoms such as focal deficits, epileptic crisis, coma state and death. There is a relative rarity of reports about hypoglycemic-induced brain lesions 2 . In newborns, the parieto-occipital region is the most affected 3 . In adults, there is a greater variability, with reports of lesions in basal ganglia, hippocampus, temporal and occipital gray matter, insula cortex, corona radiata and splenium of the corpus callosum 1,4 .The aim of this study is to report the case of a patient presenting coma, with left hemiparesis and brain lesions detected by computerized tomography scan (CT) and conventional magnetic resonance imaging (MRI). He had insulin-dependent diabetes mellitus and had a record of severe hypoglycemic episode.
CASEA 31-year-old male, insulin-dependent diabetic patient, which left his home after a family brawl, at about 8 o'clock p.m when he had a capillary glycemia, which resulted 212 mg%. He was met unconscious in the morning by his wife at a car, near their home, with many empty flasks and syringes of insulin. The last register of glycaemia in the dosimeter was 34 mg%, at about 3 o' clock a.m.He was taken to the hospital by the urgency medical care service. On admission, he showed stable vital signs and capillary glycemia of 82 mg%. On neurological examination, the patient was comatose and with left hemiparesis. He was submitted to orotracheal intubation, mechanical ventilation and supportive care. A cerebral computerized tomography (CT) scan showed a slight parietal high-density area and MRI (Figure) showed cortical lesions with hypointensity and hyperintensity in T1-and T2-weighted images, respectively, affecting the insula bilaterally, but more evident on the right side, the hippocampus (more accentuated on the right side), the medial part of frontal lobe, bilaterally but more accentuated on the right side, and the parietal lobe, almost exclusively on the right side.