{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,5]],"date-time":"2026-02-05T09:06:15Z","timestamp":1770282375797,"version":"3.49.0"},"reference-count":27,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2012,1,23]],"date-time":"2012-01-23T00:00:00Z","timestamp":1327276800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2012,1,23]],"date-time":"2012-01-23T00:00:00Z","timestamp":1327276800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Parenter Enteral Nutr"],"published-print":{"date-parts":[[2012,5]]},"abstract":"<jats:p>Biliopancreatic diversion is a predominantly malabsorptive bariatric procedure that can lead to the development of several nutrition complications, including fat\u2010soluble vitamin deficiencies. Routine supplementation with vitamins and trace elements and a strict medical follow\u2010up are essential to prevent these nutrition risks. Vitamin A deficiency is common after bariatric surgery but rarely causes clinical symptoms. Case reports have described ophthalmological and fetal complications associated with vitamin A deficiency after malabsorptive bariatric surgery. Phrynoderma is a type of follicular hyperkeratosis located on the extensor surfaces of the extremities whose main cause is vitamin A deficiency. The simultaneous occurrence of phrynoderma and ocular symptoms secondary to hypovitaminosis A after bariatric surgery is exceptional. The authors describe a man who presented follicular hyperkeratosis with nyctalopia and xerophthalmia that had appeared 1 year after biliopancreatic diversion. He admitted poor compliance with diet and daily supplementation of vitamins and oligoelements. Serum vitamin A levels were decreased. Treatment with high doses of vitamin A was associated with a clear improvement of cutaneous and ocular lesions with complete resolution after 2 months. The patient was readmitted 2 years later because of the reappearance of cutaneous lesions and micronutrient deficiency. Revisional bariatric surgery was performed. The authors review and discuss the relationship between phrynoderma, malnutrition, and vitamin A 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