Appendicitis classification

	Appendicitis Microchapters
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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.

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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