Anemia in inflammatory bowel disease: an under-estimated problem?

Area of Science:

• Gastroenterology
• Hematology
• Internal Medicine

Background:

• Anemia is a frequent complication of inflammatory bowel disease (IBD), impacting patient quality of life.
• Iron deficiency is the primary cause of anemia in Crohn's disease and ulcerative colitis.
• Understanding of anemia of chronic disease and iron deficiency has advanced, with new diagnostic and therapeutic strategies emerging.

Purpose of the Study:

• To review the current understanding of anemia in IBD patients.
• To highlight the role of iron deficiency and hepcidin in IBD-related anemia.
• To emphasize the underestimation of differential diagnosis for anemia in IBD.

Main Methods:

• Literature review on anemia in IBD.
• Discussion of iron metabolism and hepcidin regulation.
• Analysis of diagnostic tools and therapeutic strategies for anemia in IBD.

Main Results:

• Iron deficiency significantly impacts IBD patients, even without overt anemia.
• Hepcidin, regulated by iron and inflammation (e.g., interleukin-6), is central to iron homeostasis.
• Despite advances, innovative diagnostic tools are not widely implemented in routine clinical practice.

Conclusions:

• Iron deficiency anemia and anemia of chronic disease are critical considerations in IBD management.
• Intravenous iron substitution is readily available, yet the importance of accurate differential diagnosis is often overlooked.
• Further integration of advanced diagnostics is needed for optimal anemia management in IBD.