Representative NCIs in the hippocampus, parahippocampus, and the neocortex. Ring-shaped NCIs (A) and Pick body-like NCIs (B) in the dentate gyrus. Neurofibrillary tangle-like NCI in the CA2 region (C). Ring-shaped NCIs in the superficial layer (D) (arrows), and perinuclear (E) and globular (F) NCIs. A–F: α-synuclein immunohistochemistry. Scale bars = 10 μm (A–F).