24 June 2026
: Case report 
Coexisting Amyloid Positivity and Probable Dementia With Lewy Bodies in a Patient With Rapid Eye Movement Sleep Behavior Disorder
Challenging differential diagnosis, Unusual or unexpected effect of treatment, Rare coexistence of disease or pathology
Jae Hyeok Choi ABCDEF 1, Seungju Kim B 1, Jaeyeong Bae
B 1, Jiwon Lim D 1,2, Youngsoon Yang BD 1, Ik Dong Yoo CD 3, Kwang Ik Yang ADEG 1,2*
DOI: 10.12659/AJCR.952151
Am J Case Rep 2026; 27:e952151
Figure 3 18F-FP-CIT PET showing decreased dopamine transporter activity in both putamina (yellow arrows). The right striatal SBR was 1.56, the left SBR was 1.44, and the total SBR was 1.50. (The reference region was the occipital lobe and the normal range of dorsal striatum SBR was reported as 4.58±1.10 for males and 5.54±1.17 for females). (A) Axial view. (B) Coronal view. (C) Right head turn. (D) Left head turn. FP-CIT, fluoro-propyl-carbomethoxy-iodophenyl-tropane; PET, positron emission tomography; SBR, specific binding ratio.