KEY FACTS

Imaging

  • Amorphous, mid-/high-level echoes within gallbladder or bile ducts

  • Free floating or mass-like, mobile, settling in dependent position

  • Floating punctate echoes may show ring-down artifact

  • Occasionally round, low to intermediate echogenicity and mass-like: "Tumefactive" sludge

    • No posterior acoustic shadowing (unlike stones) and no internal color flow (suggesting mass)

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