Background: A König's syndrome is referred to abdominal pain in relation to meals with constipation alternated with diarrhea, meteorism, and abdominal distension. A postoperative long-term complication after Roux-en-Y gastric bypass could be the appearance of chronic abdominal pain associated with vomiting, dysphagia, and nausea.
Case Report: A 43-year-old female patient was submitted for a Roux-en-Y gastric bypass for morbid obesity with an initial body mass index (BMI) of 36 kg/m (weight 100 kg, height 168 cm).