Função do Apêndice: Sem Produção de Enzimas; Papel Linfóide e Microbioma

The vermiform appendix is a lymphoid-rich diverticulum of the cecum; it does not produce digestive enzymes.

Actual Functions

• Gut-associated lymphoid tissue (GALT): Dense follicular B/T cells; IgA production; immune sampling.
• Microbiome reservoir: Biofilm-protected commensals repopulate colon after diarrheal purge.
• Early life immune education: Peak lymphoid mass in young adulthood; involutes with age.

Clinical Relevance

• Appendicitis: Obstruction → ischemia → perforation → peritonitis.
• Appendectomy: No long-term digestive deficit; possible slight ↑ Crohn's risk, ↓ ulcerative colitis risk.
• Appendiceal tumors: Carcinoid (most common), mucinous neoplasm (pseudomyxoma peritonei).

Evolutionary vestige of cecal fermentation chamber; retained immune/microbiome utility.