Is "indeterminate colitis" Crohn's disease in the long-term follow-up?

Area of Science:

• Gastroenterology
• Colorectal Surgery
• Inflammatory Bowel Disease (IBD) Research

Background:

• The diagnosis of indeterminate colitis is challenging, often occurring in a small percentage of inflammatory bowel disease patients.
• This study investigates the long-term outcomes of surgically treated indeterminate colitis cases.

Observation:

• Indeterminate colitis was diagnosed in 4% of operated patients versus 13% of non-operated patients.
• Six surgically treated patients with indeterminate colitis were followed for a median of 5.5 years.
• The initial diagnosis included macroscopically Crohn's colitis or ulcerative colitis, with indeterminate histology pre- and peroperatively.

Findings:

• Clinicopathological follow-up revealed typical Crohn's disease in one patient and probable Crohn's in two.
• The final diagnosis remained indeterminate in three cases after the follow-up period.
• A tendency towards Crohn's colitis was observed in the long-term course of indeterminate colitis.

Implications:

• Patients diagnosed with indeterminate colitis may have a higher likelihood of developing Crohn's colitis.
• These findings are crucial for surgical decision-making, particularly when considering ileal pouch-anal anastomosis.
• Understanding the long-term trajectory of indeterminate colitis aids in personalized patient management and treatment strategies.