Table 4. Updated clinicopathologic experience at Mayo Clinic from January 1990 to April 2009 of REM sleep behavior disorder associated with dementia and/or parkinsonism.
| Primary pathologic diagnoses | N |
| Lewy body disease | 36 |
| Mutliple system atrophy | 5 |
| Progressive supranuclear palsy | 1 |
| Alzheimer's disease | 1 |
| TOTAL | 43 |
Synucleinopathy pathology associated with RBD in this series: 41/43=95%