| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Primary ulcer of colon | Finding site | False | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Obesity, colitis, hypothyroidism, cardiac hypertrophy, developmental delay syndrome | Finding site | False | Colon structure | Inferred relationship | Existential restriction modifier | 8 | 
| Primary blast injury of colon | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Megacolon due to infectious colitis | Finding site | False | Colon structure | Inferred relationship | Existential restriction modifier | 4 | 
| Megacolon due to infectious colitis | Finding site | False | Colon structure | Inferred relationship | Existential restriction modifier | 5 | 
| Megacolon due to infectious colitis | Finding site | False | Colon structure | Inferred relationship | Existential restriction modifier | 6 | 
| Infant dyschezia | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Post polypectomy electrocoagulation syndrome | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Haddad syndrome | Finding site | False | Colon structure | Inferred relationship | Existential restriction modifier | 7 | 
| Hirschsprung disease with type D brachydactyly syndrome | Finding site | False | Colon structure | Inferred relationship | Existential restriction modifier | 9 | 
| Chagas' mega disease | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Endoscopic cauterization of polyp of colon | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Colonoscopic snare polypectomy of colon | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant carcinoid tumor of colon | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Tortuous colon | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Left hemicolectomy and end to end anastomosis of colon to rectum | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 3 | 
| Left hemicolectomy with anastomosis | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Left hemicolectomy with stoma | Procedure site - Direct | False | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Kinking of colon co-occurrent and due to adhesions | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Left hemicolectomy and colostomy | Procedure site - Direct | False | Colon structure | Inferred relationship | Existential restriction modifier | 3 | 
| Left hemicolectomy and end-to-end anastomosis of colon to colon | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Right hemicolectomy and anastomosis of ileum to colon | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 4 | 
| Parasitic infection of colon caused by Cystoisospora belli | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Transverse colectomy and end-to-end anastomosis | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Transverse colectomy with anastomosis | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Transverse colectomy and anastomosis of ileum to colon | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 3 | 
| Right hemicolectomy and end to end anastomosis of ileum to colon | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 5 | 
| Sigmoid colectomy with anastomosis | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Perforation co-occurrent and due to diverticular disease of colon | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 4 | 
| Diverticular disease of colon | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Diverticulosis of colon without diverticulitis | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Diverticulosis of colon | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Microsatellite instability-high colorectal cancer | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Allergic enterocolitis caused by food protein | Finding site | False | Colon structure | Inferred relationship | Existential restriction modifier | 3 | 
| Allergic colitis caused by food protein in infant | Finding site | False | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Partial colectomy with colostomy and creation of mucofistula | Procedure site - Direct | False | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Partial colectomy with skin level colostomy | Procedure site - Direct | False | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Allergic enterocolitis | Finding site | False | Colon structure | Inferred relationship | Existential restriction modifier | 3 | 
| Defecography with barium enema | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 4 | 
| Fluoroscopic barium enema via colostomy | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Fluoroscopy of colon with water soluble contrast | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Acute ischemic enterocolitis | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 3 | 
| Ischemic colitis | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Chronic ischemic enterocolitis | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 3 | 
| Acute ischemic colitis | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Ischemic enterocolitis | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Therapeutic contrast enema for reduction of intussusception of colon using fluoroscopic guidance | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Radiological reduction of intussusception of rectum using barium enema | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 3 | 
| Ileocolic intussusception | Finding site | False | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Cecocolic intussusception | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 4 | 
| Cecocolic intussusception | Finding site | False | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Squamous cell carcinoma of colon | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Complete obstruction of colon | Finding site | False | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Megacolon caused by drug | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Acquired megacolon in adults | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Megacolon due to infectious colitis | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Megacolon due to infectious colitis | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 3 | 
| Secondary congenital megacolon | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Idiopathic megacolon | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Acquired megacolon in child | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Secondary acquired megacolon | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Idiopathic megacolon in child | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Fluoroscopy for colonic transit study | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Haddad syndrome | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Haddad syndrome | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Hirschsprung disease with nail hypoplasia and dysmorphism | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 4 | 
| Hirschsprung disease with deafness and polydactyly syndrome | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Hirschsprung disease with type D brachydactyly syndrome | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Hirschsprung disease with nail hypoplasia and dysmorphism | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Hirschsprung disease with deafness and polydactyly syndrome | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 3 | 
| Hirschsprung disease with type D brachydactyly syndrome | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 3 | 
| Obesity, colitis, hypothyroidism, cardiac hypertrophy, developmental delay syndrome | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Combined endoscopic and laparoscopic excision of polyp of colon | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Combined endoscopic and laparoscopic excision of polyp of colon | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Endoscopic snare resection of lesion of colon using full thickness resection device | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Allergic proctocolitis caused by food protein | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Enterocolic fistula | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Fistula of colostomy | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Intrathoracic esophageal anastomosis with interposition of colon | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Parasitic infection causing colitis | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Allergic colitis caused by food protein in infant | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Focal active colitis | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Infection causing abscess of colon | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Partial obstruction of colon | Finding site | False | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Excision of colon and rectum | Procedure site - Direct | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Structure of lymphoid tissue of colon | Is a | True | Colon structure | Inferred relationship | Existential restriction modifier |  | 
| Gastrocolic ulcer | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Dietetic enterocolitis | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Long segment Hirschsprung's disease | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 3 | 
| Short segment Hirschsprung's disease | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 3 | 
| Allergic enterocolitis | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Ulcerative ileocolitis | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Neutropaenic enterocolitis | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Megacystis, microcolon, hypoperistalsis syndrome | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Ulcerative proctocolitis | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Inflammation of small intestine and colon | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Cutaneous photosensitivity and lethal colitis syndrome | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Megacolon due to infectious colitis | Finding site | False | Colon structure | Inferred relationship | Existential restriction modifier | 1 | 
| Allergic enterocolitis caused by food protein | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Necrotizing enterocolitis of newborn stage 1A Bell's classification | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 | 
| Necrotizing enterocolitis of newborn stage 1B Bell's classification | Finding site | True | Colon structure | Inferred relationship | Existential restriction modifier | 2 |