[Should subdivision of regressive ischemic colitis be envisaged?]

Area of Science:

• Gastroenterology
• Coloproctology

Context:

• Regressive ischemic colitis is a commonly accepted diagnosis for acute hemorrhagic colitis.
• This condition affects all age groups and typically resolves spontaneously, though colonic stenosis can occur.
• The existing literature lacks formal diagnostic criteria and conclusive evidence for an ischemic mechanism, especially in younger patients without vascular issues.

Purpose:

• To critically analyze the literature on regressive ischemic colitis.
• To investigate the diagnostic criteria and underlying mechanisms of this condition.
• To compare regressive ischemic colitis with other forms of colitis.

Summary:

• The term 'regressive ischemic colitis' is widely used but lacks formal diagnostic criteria.
• Evidence for an ischemic cause is limited, particularly in young individuals.
• Significant clinical, radiological, endoscopic, and histological similarities exist between regressive ischemic colitis and infectious colitis (e.g., E. coli O157:H7) and drug-induced hemorrhagic colitis.

Impact:

• Challenges the classification of regressive ischemic colitis as a distinct clinical entity.
• Suggests that 'regressive ischemic colitis' may represent a syndrome with diverse etiologies rather than a specific condition.
• Highlights the need for revised diagnostic approaches and etiological investigations for acute hemorrhagic colitis.