[Difficulties in differentiation between Crohn disease and ulcerative colitis]

Area of Science:

• Gastroenterology
• Inflammatory Bowel Disease (IBD) research

Background:

• A patient presented with a history of ulcerative colitis diagnosed in 1991.
• Recurrent episodes of ulcerative colitis were managed medically until a colectomy in 1994.

Observation:

• Histological examination post-colectomy led to a revised diagnosis of Crohn's disease.
• The patient developed a new episode of Crohn's disease shortly after surgery.

Findings:

• The initial diagnosis of ulcerative colitis was incorrect; the patient actually had Crohn's disease.
• An anal fistula developed as a complication of the post-colectomy Crohn's disease episode.

Implications:

• This case highlights the importance of accurate diagnosis in inflammatory bowel disease.
• Misdiagnosis can lead to suboptimal treatment and complications such as anal fistulas.