Allergic reaction to contrast medium following gastric band adjustment.

Bariatric surgery is increasingly performed for effective weight loss. A morbidly obese 27-year-old woman underwent laparoscopoic adjustable gastric banding. After a postoperative adjustment of the stomal diameter of the band with ioxaglate, she presented an immediate hypersensitivity reaction. With the patient's consent, cutaneous tests to contrast agents used during the procedure and to latex were performed. Allergy to ioxaglate was confirmed by skin-test positivity. This case suggests the need for allergological investigation of drugs/substances administered during the perioperative period, in case of hypersensitivity reaction.