Histology Course S I 12 Department of Pathology, University of Zurich Histokurs

S I 12 amoebic colitis PAS further information (German) on HiPaKu
  ICD-10: A06.0

34-year-old male with severe lower abdominal pain and bloody diarrhoea. Partial resection of the colon for suspected ulcerative colitis.

- Wall of the colon with deeply extending ulcer
- Amoeba present in the necrotic area of the tissue on PAS staining: Entamoeba histolytica.
- The amoeba are round, single cell parasites the size of approximately one epithelial cell.