Final answer:
Porcelain gallbladder is another name for calcified cholecystitis, where the gallbladder walls become covered with calcified material.
Step-by-step explanation:
The condition known as porcelain gallbladder is another name for a calcified gallbladder, where the walls of the gallbladder become covered with calcified material. This can be a result of chronic cholecystitis, which is the inflammation of the gallbladder. Calcified cholecystitis is the correct term that corresponds to porcelain gallbladder. In contrast, choledocholithiasis refers to gallstones in the bile duct, and emphysematous cholecystitis is a rare form of gallbladder inflammation where gas-forming organisms infect the gallbladder wall.