What are the characteristics of the gangrenous, perforated, phlegmonous, and spontaneously resolving stages of appendicitis?

Updated: Jul 23, 2018
  • Author: Sandy Craig, MD; Chief Editor: Barry E Brenner, MD, PhD, FACEP  more...
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Gangrenous appendicitis

Intramural venous and arterial thromboses ensue, resulting in gangrenous appendicitis.

Perforated appendicitis

Persisting tissue ischemia results in appendiceal infarction and perforation. Perforation can cause localized or generalized peritonitis.

Phlegmonous appendicitis or abscess

An inflamed or perforated appendix can be walled off by the adjacent greater omentum or small-bowel loops, resulting in phlegmonous appendicitis or focal abscess.

Spontaneously resolving appendicitis

If the obstruction of the appendiceal lumen is relieved, acute appendicitis may resolve spontaneously. [21, 22] This occurs if the cause of the symptoms is lymphoid hyperplasia or when a fecalith is expelled from the lumen.

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