There has been a report of SIADH after lateral medullary infarction, and it was suggested that the nucleus tractus solitarius injury of the ventral medulla might cause failure of transmission of non-osmotic stimuli from the carotid sinus via the afferent vagal nerve, which causes disinhibition of ADH secretion at the pituitary gland, causing SIADH [4]. The gene discussed is AVP; the disease is inappropriate ADH syndrome.