Appendicitis classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief:

Overview

Appendicitis is a condition characterized by inflammation of the appendix. It can be classified into several subtypes based on perforation and the type of obstruction. Jay A. Yelon • Fred A. Luchette

Classification

Based on Type of Obstruction

Classifications based on the type of obstruction include:^[1]

Infectious processes
Fibrosis - such as due to scar tissue from a previous surgery
Fecaliths - hard fecal masses
Neoplasia - carcinoid, adenocarcinoma, or mucocele
Parasites - in endemic areas
Calculi
Lymphoid hyperplasia

Based on Perforation

Classifications can also be based on perforations or non-perforations.

Perforating - increases in incidence with age and is associated with the following types of bacterial infiltration:^[2]
- Escherichia coli
- Peptostreptococcus
- Bacteroides fragilis
- Pseudomonas species
Non-perforating

References

↑ Yelon, Jay A. & Luchette, Fred A. (2014), Geriatric Trauma and Critical Care (1st ed.), New York, New York: Springer
↑ Luckmann R (1989). "Incidence and case fatality rates for acute appendicitis in California. A population-based study of the effects of age". Am. J. Epidemiol. 129 (5): 905–18. PMID 2784936. Unknown parameter |month= ignored (help)

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[1] Yelon, Jay A. & Luchette, Fred A. (2014), Geriatric Trauma and Critical Care (1st ed.), New York, New York: Springer

[pmid2784936-2] Luckmann R (1989). "Incidence and case fatality rates for acute appendicitis in California. A population-based study of the effects of age". Am. J. Epidemiol. 129 (5): 905–18. PMID 2784936. Unknown parameter |month= ignored (help)

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