26) A 35 years old male who had chronic duodenal ulcer for the | Surgery videos & books

26) A 35 years old male who had chronic duodenal ulcer for the last six years presents with worsening of symptoms loss of periodicity of symptoms, pain on rising in the morning sense of epigastric bloating and postprandial vomiting. The Most likely cause of the worsening of his symptoms is the development of: