Fig. 14
From: Parasitic diseases as a cause of acute abdominal pain: imaging findings
A 12-year-old boy was admitted to the emergency department with a 3-day history of hematochezia and diarrhea. He also complained of abdominal pain and abdominal distention. Physical examination revealed diffuse abdominal tenderness. Increased serum levels of acute-phase reactants and leukocytosis were evident at blood analysis. a, b Axial contrast-enhanced CT images demonstrate wall thickening and contrast enhancement of the appendix vermiformis (arrowhead) and ileum (arrows, a). Intraabdominal free fluid (asterisks, a, b) and increased mucosal enhancement of the colon (arrows, b) are also noted. Mucosal ulcers were evident at colonoscopy. Histopathological examination revealed the presence of trophozoits of Entamoeba histolytica, superficial ulcers, and lymphangiectasia at the lamina propria of the small bowel