Abstract:

Objective To explore the value of CT and MRI in the early diagnosis of acute type I Herpes simplex encephalitis (HSE). Methods The clinical data of eleven patients with HSE in early stage were collected, and the manifestations in CT and MRI were analysed. Results The imaging findings of HSE in early stage were divided into two types. The lesions involved basal ganglia, thalamus and brainstem were characterised by “basal ganglia standing out” sign, while those in frontal and temporal lobe were presented as “knife-cutting” sign. Conclusion MRI and CT play an important role in the early diagnosis of HSE.

Key words: acute type Ⅰ herpes simplex encephalitis, early stage, imaging manifestation