A cluster of polyneuropathy and Wernicke-Korsakoff syndrome in a bariatric unit.

BACKGROUND: Wernicke-Korsakoff syndrome and peripheral neuropathy are very uncommon in bariatric surgical practice. The literature indicates that these complications tend to strike patients receiving unbalanced diets or undergoing rapid weight-loss. METHODS: In a retrospective analysis of the initial experience of a bariatric team in the city of Belem, Pará, in northern Brazil, 5 cases were diagnosed in the first year, 4 of them following gastric bypass and the last one after therapy with an intragastric balloon. RESULTS: All episodes followed periods of severe vomiting, which certainly interfered with intake of food as well as of routine vitamin supplements, resulting in severe polyneuropathy and other neurologic manifestions, mostly damaging motility of lower limbs. Therapy consisted of pharmacologic doses of vitamin B1 along with restoration of adequate diet and multivitamin prescriptions. Physical therapy was employed to prevent atrophy and accelerate normalization of muscle strength. All patients responded to this program after variable intervals without significant sequelae. CONCLUSIONS: Thiamine-related neurologic derangements were a cause for much concern and prolonged morbidity in this series, but responded to vitamin B1 replenishment. A high degree of clinical suspicion in bariatric patients and urgent therapeutic intervention whenever postoperative vomiting persists for several days, especially during the first 2-3 months after operation, are the safest approach to these uncommon episodes. It is speculated whether peculiarities in the regional diet of this area in Brazil could have influenced the high incidence of the neurologic aberrations.

Complicaçäo pouco relatada em obesos mórbidos: polineuropatia relacionada à hipovitaminose B1 / A rarely reported complication in morbid obesity - vitamin B1 - related polyneuropathy

Deficiências agudas de vitamina B1 vinculam-se a quadros neurológicos e graves como síndrome de Wernicke-Korsakoff e neuropatias periféricas. A imensa maioria é observada na esfera de alcoólatras crônicos com dieta pobre e mal balanceada, porém há um pequeno contingente visto em pacientes com emagrecimento acelerado por tratamento anti-obesidade, greve de fome, hiperemese gravídica, e nutriçäo parenteral sem reposiçäo vitamínica. Neste estudo, é apresentada uma série de pacientes bariátricos que desenvolveral grave neuropatia em conexäo com vômitos e intolerância ao procedimento após a alta hospitalar. Todos os casos tivaram reposiçäo de tiamina observando-se respostas geralmente favoráveis. Discute-se a provável etiopatogenia desta complicaçäo.(au)