organ system benign neoplasm
 |__gastrointestinal system benign neoplasm__
gastrointestinal system disease              |
 |__gastrointestinal system benign neoplasm__|
 |__intestinal disease_______________________|
                                             intestinal benign neoplasm
                                              |__anus benign neoplasm
                                              |   |__anal gland neoplasm
                                              |   |__anal neuroendocrine tumor
                                              |   |__anus leiomyoma
                                              |__appendiceal neoplasm
                                              |__cecal benign neoplasm
                                              |   |__cecum adenoma
                                              |__colonic benign neoplasm
                                              |   |__colon adenoma
                                              |   |__colon neuroendocrine neoplasm
                                              |   |__colonic lymphangioma
                                              |   |__sigmoid neoplasm(+)
                                              |__colorectal adenoma
                                              |__intestinal neuroendocrine benign tumor
                                              |__large bowel leiomyoma
                                              |__large intestine adenoma
                                              |__large intestine lipoma
                                              |   |__lipoma of colon
                                              |__rectal benign neoplasm
                                              |   |__rectal adenoma
                                              |   |__rectal leiomyoma
                                              |   |__rectal lipoma
                                              |__small intestine benign neoplasm
                                                  |__benign ileal neoplasm
                                                  |__duodenal benign neoplasm(+)
                                                  |__jejunal neoplasm
                                                  |__small intestine leiomyoma
                                                  |__small intestine neuroendocrine neoplasm