PMC7150723_01
CT of the abdomen showing a thick-walled caecum, with adjacent fat stranding and a small volume of adjacent free fluid: (a) axial section and (b) coronal section.
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fig1
Computed tomography (CT) of the abdomen and pelvis with intravenous contrast showed a thick-walled (6.3 mm) caecum with fat stranding and a small volume of adjacent free fluid (see Figure 1).
Caecal mass as seen on colonoscopy.
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fig2
The patient subsequently had a colonoscopy which showed a mass at the caecal pole with edematous, inflamed tissue and pus (see Figure 2).
Caecal mass observed at laparotomy.
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fig3
Intraoperatively, a large caecal mass was found with an associated abscess and multiple enlarged mesenteric lymph nodes (see Figure 3).
(a) Normal mucosa separated by an intact muscularis mucosa (M.M.) from malignant cells in the submucosa. (b) High power view of the mucosa overlying the tumour showing neutrophils outlined in fluorescent green; numbering >40 per h.p.f.
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fig4
The majority of the tumour was observed to be deep to mucosa, which showed no evidence of malignancy, and dense eosinophilic infiltrate of more than 40 per high powered field (Figure 4).
High power view of the mucosa of the ascending colon at a site distant from the tumour showing eosinophils outlined in fluorescent green; numbering <5 per h.p.f.
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fig5
This can be compared to Figure 5 which shows a section of the colonic mucosa taken from the ascending colon which showed less than 5 eosinophils per high powered field.