A 21-year-old woman developed hyperemesis gravidarum, complicated by Wernicke's encephalopathy and central pontine myelinolysis. For the latter, time course of the lesions on magnetic resonance imaging suggests a pathogenetic role for hypophosphatemia rather than for hyponatremia.
Peeters, A., van de Wyngaert, F., Vanlierde, M., Sindic, C., & Laterre, E.-C. (1993). Wernickes Encephalopathy and Central Pontine Myelinolysis Induced By Hyperemesis Gravidarum. Acta Neurologica Belgica, 93(5), 276-282. https://hdl.handle.net/2078.5/74123 (Original work published 1993)