PMC5725155_01
Computed tomography (CT) image.. CT scan showing (a, b) multiple liver abscesses and (b, c) an enlarged appendix with a pseudotumoral appearance (septum-like structure) (yellow arrow).
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Contrast-enhanced computed tomography (CT) revealed multiple liver abscesses (Fig. 1a, b) and an enlarged appendix with a pseudotumoral appearance (septum-like structure; Fig. 1c, d), which suggested acute appendicitis.
Macroscopic findings.. Macroscopic examination of isolated specimens revealed SSA/P (thin yellow arrow) located at next to the appendiceal orifice and mucosal inflammation due to a perforation of the appendix (thick yellow arrow).
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Macroscopic examination of the excised specimen revealed a torose lesion (20 x 10 mm in size) localized at next to the appendiceal orifice, and perforation of the appendix (Fig. 2).
Microscopic findings.. Microscopic examination demonstrating (a) serrated cavities in the gland (black arrow) (hematoxylin-eosin [H&E] staining, original magnification x20), (b) dilated or irregularly branched crypt bases with horizontal extension (black arrow) (H&E staining, original magnification x100), and (c) dilatation of basal crypts (black arrow) and mild to moderate nuclear atypia (H&E staining, original magnification x400).
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Microscopic examination of the lesion revealed serrated cavities in the gland (Fig. 3a) and the typical histological features of an SSA/P, such as dilatation and branching of basal crypts (Fig. 3b, c).
Immunohistochemical findings.. Immunohistochemical staining showing positive results for (a) MUC5 and focal positive results for (b) MUC6 expressions, partially positive results for (c) p53, and (d) a nuclear expression of the proliferation-associated Ki-67-antigen.
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Immunohistochemical staining was positive for p53, MUC5, and MUC6 expressions, and a nuclear expression of the proliferation-associated Ki-67-antigen (Fig. 4).
Computed tomography (CT) image.. On the CT scan, (a, b) the size and number of the liver abscesses decreased 13 days after surgery, and (c, d) the abscesses completely disappeared 59 days after the surgery.
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We confirmed the decreased size and number of the abscesses on CT 13 days after the surgery (Fig. 5a, b). The abscesses completely disappeared 59 days after the surgery (Fig. 5c, d).