This is a review of the clinical history of a 62-year-old patient who enters the Eugenio Espejo Hospital with a picture of altered consciousness and manifestations of Parkinsonism. An inadequate correction of hyponatremia as a cause of parkinsonism, is known as Central Pontine Osmotic Myelinolysis Syndrome. In the Osmotic Demyelination Syndrome, the exact mechanism that is responsible for the degeneration of oligodedrocytes with myelin damage and axon preservation is not fully understood...Se trata de una revisión de historia clínica de una paciente de 62 años que ingresa al Hospital de Especialidades Eugenio Espejo con un cuadro de alteración de la conciencia y manifestaciones de parkinsonismo. Una corrección inadecuada de hiponatremia como causante de parkinsonismo, a este síndrome se lo conoce como Mielinolisis central pontina por osmosis...