A 45-year-old patient was referred for a consultation with a psychiatrist due to complaints of abdominal pain and discomfort that occur in emotionally straining situations. Objectively, no changes of the gastrointestinal tract were detected. The complaints first arose over 10 years the background of a severe alcohol poisoning against. The patient has been repeatedly visiting gastroenterologists, who were unable to find any gastrointestinal pathology in the patient. The prescribed therapy was ineffective. What condition is most likely in the patient?