PMC5449582_01
Abdominal US revealing a hydatid cyst in the liver. Note the presence of a dilated intrahepatic bile duct (asterisk) in proximity to the cyst.
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F1
With a high clinical suspicion of acute appendicitis, an abdominal ultrasonography (US) revealed an aperistaltic dilated appendix without fecolith and a coexistent 7.2 x 6.7 cm hydatid cyst in the liver (Figure 1).
Histopathology results showing (A) a partly disintegrated brood capsule inside the appendicular lumen (hematoxylin and eosin stain, 40x), with (B) a floating protoscolex (hematoxylin and eosin stain, 100x).
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F2
This protoscolex was still immature as there was no evidence of hooklets or suckers that would produce a hydatid cyst (Figure 2).
Typical acellular laminated appearance of the hydatid cyst wall removed from liver (H&E stain, 100x).
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F3
The characteristic laminated membrane of the hydatid cyst was identified under microscope (Figure 3).