Skip to main content

Table 2 The classification of appendiceal anomalies

From: A case of a horseshoe appendix

•Number anomalies
1. Agenesis: absence of appendix
2. Duplex appendix
A: partial duplication with both appendices sharing a common base like “Y-shaped” on a single cecum
B: complete duplication of the appendix on a single cecum
•B1 avian type: two appendices symmetrically placed on either side of the ileocecal valve
•B2 tenia-coli cecum type: one appendix arising from the usual site of the cecum and the other arising from the cecum along the tenia
•B3 tenia-coli hepatic flexure type: one appendix arising from the usual site of the cecum and the other arising from the hepatic flexure of the colon along the tenia.
•B4 tenia-coli splenic flexure type: one appendix arising from the usual site of the cecum and the other arising from the splenic flexure of the colon along the tenia.
C: duplication of the cecum, each having its own appendix
3. Triplex appendix: complete triplication of appendix on the cecum
• Shape anomalies
 Horseshoe Appendix
Disposal of the mesentery
• Sagittal disposal: the both bases of the appendix along the tenia in sagittal direction
• Frontal disposal: the bases of the appendix not on the tenia
Location of the orifice
• Cecum-cecum
• Cecum-ascending colon