Inflammatory bowel disease. Part I: Nature and pathogenesis.

Area of Science:

• Gastroenterology
• Immunology
• Microbiology

Background:

• Ulcerative colitis and Crohn's disease are significant human illnesses with complex, yet unknown, etiologies.
• IBD pathogenesis involves intricate interactions between genetic, environmental, microbial, and immunologic factors.
• While ulcerative colitis incidence is stable, Crohn's disease is increasing, with diagnostic challenges in some cases.

Purpose of the Study:

• To elucidate the nature and pathogenesis of inflammatory bowel disease (IBD).
• To review current knowledge on microbial, immunologic, and genetic mechanisms in IBD.
• To provide a comprehensive overview of IBD, covering etiology, clinical features, and management.

Main Methods:

• Review of recent literature (1988-1990) and author's 55 years of experience.
• Focus on microbial, immunologic, and genetic factors in disease development.
• Analysis of clinical features, diagnostic methods, and therapeutic approaches.

Main Results:

• IBD etiology is multifactorial, with precise mechanisms remaining obscure.
• Newer insights into microbial, immunologic, and genetic contributions to IBD are emerging.
• Diagnostic differentiation between ulcerative colitis and Crohn's disease can be challenging initially.

Conclusions:

• The exact causes of IBD are not yet established, necessitating supportive and facilitative therapies.
• Treatment principles for ulcerative colitis and Crohn's disease share similarities, emphasizing individualized programs.
• Medical management includes symptom relief, nutritional support, and anti-inflammatory/immunosuppressive agents; surgery is an option for ulcerative colitis.