Appendicitis classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Farwa Haideri [2]

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 cause of Obstruction

Appendicitis may be classified based on the cause of obstruction into:^[1]

Infectious appendicitis - Obstruction of appendicial lumen is due to infectious inflammtion.
Fibrosis appendicitis- Scar tissue from a previous surgery can lead to obstruction.
Fecaliths appendicitis - hard fecal masses block the outlet of appendix
Neoplasic appendicitis - carcinoid, adenocarcinoma, or mucocele is responsible for increased secretions resulting in blockage.
Parasitic appendicitis- In endemic areas obstruction of the appendicial lumen is due to parasitic load.
Calculic appendicitis
Lymphoid hyperplasic appendicitis Obstruction of lumen due cell 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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