PMC5727563_01
CT abdomen: linear calcification extending from the gallbladder through the cystic duct (dashes).
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Initial work-up began with an enhanced computed tomography (CT) scan, which revealed linear dense calcifications within the gallbladder extending into the cystic duct to the junction of the common bile duct (Figure 1).
Magnetic resonance cholangiopancreatography (MRCP) demonstrating the 3-line sign typical for ascaris worm (arrow).
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Tumor markers were within the normal ranges, and MRCP showed a 3-line sign and was unremarkable for any other abnormalities (Figure 2).
Gross specimen of the gallbladder with a mucus plug mimicking a worm.
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Gallbladder gross examination was suggestive of a parasitic worm with some sludge (Figure 3).
Microscopic examination of the tubular structure confirming a thick mucus content and absence of parasitic infestation.
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However, the definitive histopathological study revealed a chronic cholecystitis with thick mucus content and no evidence of a parasitic infection, worm, larva, or ova (Figure 4).