What is the sonographic appearance of a gallbladder that is filled with cholesterolosis?

The sonographic appearance of a gallbladder filled with cholesterolosis is characterized by thickened wall with echogenic foci. Cholesterolosis is a condition where cholesterol deposits occur within the gallbladder wall, leading to a thickened appearance. These deposits can appear as echogenic foci on ultrasound due to their reflective properties, differentiating them from surrounding structures.

In a healthy gallbladder, the wall is typically of normal thickness, and any significant thickening or echogenic foci can indicate underlying pathology such as cholesterolosis or other conditions. The presence of these echogenic foci is a hallmark of cholesterolosis, as it reflects the accumulation of cholesterol esters and phospholipids within the gallbladder wall.

Other options, like a normal wall thickness or absence of the gallbladder, would not align with the sonographic findings typically associated with cholesterolosis. A large cystic structure may suggest other conditions such as gallbladder polyps or even larger gallstones, which are not descriptive of cholesterolosis specifically. Thus, thickened walls combined with echogenic foci in the gallbladder is the correct interpretation for diagnosing cholesterolosis through sonography.