Fig. 3
From: Sonographic images of hepato-pancreatico-biliary and intestinal ascariasis: A pictorial review
A 14-year-old female with acute biliary colic. (a) Multiple ascaris in CBD, the spaghetti sign, CBD is filled with multiple worms (long thick white arrow), (b) intra hepatic duct of the left lobe of liver showing a double linear echogenic wall indicating ascariasis (white arrow) and (c) following antihelminthic medication, sonography was repeated the next day showing reduction in the number of worms. Note double echogenic walls (strip sign) of CBD round worm (white arrow)