Neuromyelitis optica spectrum disorder (NMOSD) is an autoimmune astrocytopathy against aquaporin-4 (AQP4) water channels.Area postrema syndrome (APS) is an NMOSD variant characterized by recurrent intractable hiccups and vomiting. 1,2 Acute brainstem syndrome is another recently described variant that presents with disturbances of arousal, cranial nerve deficits, and neuroophthalmological syndromes. 1,2 Involvement of the periaqueductal region, mammillary bodies and dorsomedial thalamus are classically described in Wernicke's encephalopathy (WE). [3][4][5] Nonalcoholic associations of WE may be