 "H. pylori" has also been associated with the development of bile duct cancer and has been associated with a wide range of other diseases although its role in the development of many of these other diseases requires further study.The "Helicobacter heilmannii sensu lato" species of "helicobacter" bacteria take as part of their definition a similarity to "H. pylori" in being associated with the development of stomach inflammation, stomach ulcers, duodenum ulcers, stomach cancers that are not lypmhomas, and extrnodal marginal B cell lymphomas of the stomach.It is important to recognize and diagnose the association of "Helicobacter heilmannii sensu lato" with these upper gastrointestinal tract diseases, particularly extranodal marginal zone lymphoma of the stomach, because many of them have been successfully treated using antibiotic-based drug regimens directed against the instigating "Helicobacter heilmannii sensu lato" bacterial species.