Case 1. Histopathology of the brain. Histology of different cornu ammonis segments (CA) 1 through 4. All areas show eosinophilic nerve cell necroses (white arrowheads). Presumable synaptic incrustation is occasionally seen (black arrowhead). CA4 is most severely affected and presents with severe cytodepletion next to actual nerve cell necroses. There further is an astrogliosis (AG) and microglial reaction (MG). Hil hilus of dentate gyrus, SGZ subgranular zone, G
CL granular cell layer of dentate gyrus, HE, Prof.