Sleep-related Eating Disorder in a Patient with Parkinson's Disease.

Sleep disorders constitute a major aspect of the non-motor symptoms of Parkinson's disease (PD). Rapid eye movement (REM) behavior disorders are the most frequently experienced parasomnias in patients with PD. Non-REM sleep disorders like confusional arousals, sleep terrors, sleepwalking, and sleep-related eating disorder (SRED) are also associated with PD. Parasomnias can affect the quality of life of the patients as well as the night time sleep of their bed partners. Hence, it is important for physicians to recognize the occurrence of parasomnias in PD. We report an unusual case of PD with SRED along with obstructive sleep apnea (OSA) and REM behavior disorder. To our knowledge, only two cases have been reported in the literature highlighting the association of SRED with PD. We also explain the different night-time eating disorders like nocturnal eating syndrome and binge eating syndrome, which can be seen in PD, and differentiate them from SRED.