[Extra-intestinal complications of ulcerative colitis: hematologic complication]

Area of Science:

• Hematology
• Gastroenterology
• Internal Medicine

Context:

• Ulcerative colitis (UC) is a chronic inflammatory bowel disease.
• Extra-intestinal manifestations (EIMs) of UC can affect various organ systems.
• Hematological disorders are recognized EIMs in UC patients.

Purpose:

• To review and summarize the spectrum of blood diseases associated with ulcerative colitis.
• To highlight the frequency, potential causes, and diagnostic considerations for these hematological complications.

Summary:

• Commonly reported blood disorders in UC include iron deficiency anemia (most frequent, often due to GI bleeding), autoimmune hemolytic anemia, idiopathic thrombocytopenic purpura, folic acid deficiency megaloblastic anemia, granulocytopenia (potentially linked to sulfasalazine), and increasingly, acute or chronic leukemia (etiology unclear).
• Mechanisms involve chronic blood loss, autoantibody production against red blood cells or platelets, adverse drug reactions, and potentially unknown oncogenic factors.
• Routine peripheral blood counts, serum iron, and folic acid levels are recommended for early detection and management of these complications.

Impact:

• Early identification of hematological complications can lead to timely interventions, improving patient outcomes in ulcerative colitis.
• Understanding the diverse blood-related EIMs aids clinicians in comprehensive patient monitoring and management strategies.
• This review underscores the importance of integrating hematological surveillance into the routine care of ulcerative colitis patients.