Final answer:
GB hydrops refers to gallbladder hydrops, which is caused by a biliary tree obstruction. This blockage can lead to regurgitation of bile pigments into the blood and urine, causing choluric jaundice.
Step-by-step explanation:
GB hydrops, also known as gallbladder hydrops, is typically associated with a biliary tree obstruction. This obstruction can occur due to various reasons, but primarily involves blockage of the hepatic or common bile ducts. When these ducts are obstructed, conjugated bile pigments that should normally be excreted are instead regurgitated into the hepatic veins and lymphatics. This causes the bile pigments to appear in both the blood and urine, resulting in a condition known as choluric jaundice.