Histology Course A IV 2 Department of Pathology, University of Zurich Histokurs

A IV 2 Acute suppurative appendicitis HE further information (German) on HiPaKu 
  ICD-10: K35
13-year-old girl underwent appendectomy because of acute pain in the right lower quadrant.
- Fibrotic obliteation of the tip of the appendix.
- At the tip, diffuse infiltration of the appendiceal wall and the mesenteriolum by neutrophilic granulocytes (suppurative inflammation).
- Edema of the appendiceal wall and congestion of blood vessels.
- Focal fibrinopurulent peritonitis (creates rebound tenderness).
- Remainder of the appendix with intact mucosa (no ulcerations or erosisons). Focal suppurative inflammation of submucosa and muscularis externa.