PMC9149446_01
a Gross examination of the appendix showing the redness on the surface. b Cross sections of the formalin fixed appendix showing remarkable thickening of the wall. c, d Low- and high-power magnification of the appendix showing extensive necrosis (c, x50, hematoxylin and eosin staining) and acute (neutrophilic) inflammation on the serosa (d, x400, hematoxylin and eosin staining).
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F1
There was swelling, inflammation, and pus-covering serosa (Fig. 1a). Microscopic examination showed acute inflammation of the appendix with focal necrosis, polymorph nucleates (neutrophilic) infiltration in the appendix wall, and fibrin on the surface (Fig. 1b-d).