A 73-year-old patient complains of vague right upper quadran…

A 73-year-old patient complains of vague right upper quadrant pain.  A hyperechoic focus with marked posterior acoustic shadowing is demonstrated in the anterior wall of the gallbladder. This history is most consistent with which of the following pathologies?

A 40 year-old male patient complains of RUQ pain, nausea, vo…

A 40 year-old male patient complains of RUQ pain, nausea, vomiting, increased WBC, and fever.  The ultrasound images demonstrate a complex fluid collection with an irregular gallbladder wall, gallbladder stones, and inflammatory changes.  What is the best diagnosis?