Paraneoplastic
Limbic Encephalitis
Figure 44. Paraneoplastic limbic encephalitis. Coronal FLAIR and
contrast-enhanced T1W MR images. MR imaging reveals bilateral and
symmetrical increase in volume and T2 signal intensity of the hippocampi and
parahyppocampal gyri, as well as the amygdalae. These areas are slightly
hypointense on T1WI, with no change in signal intensity after administration
of gadolinium. Diffusion-weighted images are negative in this condition.