Which liver condition often presents with normal liver function tests?

Which liver condition often presents with normal liver function tests?

• A. PCLD
• B. Caroli disease
• C. Fatty infiltration
• D. Reidel lobe

Answer: (A)

Liver function tests can be normal even when the liver is significantly affected on imaging. In polycystic liver disease, numerous hepatic cysts fill the liver but the hepatocytes often remain functional, so enzymes, bilirubin, and other labs stay within normal limits unless complications arise (like infection, hemorrhage, or compression of bile ducts). This is why it’s commonly seen that patients with extensive cystic liver disease have normal LFTs despite a substantial abnormal appearance. Caroli disease, with dilation of intrahepatic bile ducts, tends to disrupt bile flow and commonly causes a cholestatic pattern on labs (elevated bilirubin and alkaline phosphatase, possible transaminase elevations) rather than normal LFTs. Fatty infiltration can show normal tests early but more often shows elevated enzymes as fat accumulation and inflammation progress. Reidel lobe is an anatomical variant rather than a disease process; while labs can be normal, it’s not a disease that typically presents with abnormal LFTs in the way cystic or inflammatory liver conditions do.

Liver function tests can be normal even when the liver is significantly affected on imaging. In polycystic liver disease, numerous hepatic cysts fill the liver but the hepatocytes often remain functional, so enzymes, bilirubin, and other labs stay within normal limits unless complications arise (like infection, hemorrhage, or compression of bile ducts). This is why it’s commonly seen that patients with extensive cystic liver disease have normal LFTs despite a substantial abnormal appearance.

Caroli disease, with dilation of intrahepatic bile ducts, tends to disrupt bile flow and commonly causes a cholestatic pattern on labs (elevated bilirubin and alkaline phosphatase, possible transaminase elevations) rather than normal LFTs. Fatty infiltration can show normal tests early but more often shows elevated enzymes as fat accumulation and inflammation progress. Reidel lobe is an anatomical variant rather than a disease process; while labs can be normal, it’s not a disease that typically presents with abnormal LFTs in the way cystic or inflammatory liver conditions do.