Low phospholipid-associated cholestasis and cholelithiasis.

Area of Science:

• Hepatology
• Genetics
• Gastroenterology

Background:

• Low phospholipid-associated cholestasis and cholelithiasis (LPAC) is a genetic disorder characterized by cholesterol gallbladder and intrahepatic stones.
• It stems from mutations in the ABCB4 gene, affecting bile phosphatidylcholine secretion and leading to lithogenic bile.
• This results in cholangiocyte injury, biliary lesions, and cholestasis.

Purpose of the Study:

• To outline the clinical presentation, diagnostic criteria, and therapeutic approaches for LPAC syndrome.
• To emphasize the role of ABCB4 gene mutations in the pathogenesis of LPAC.
• To provide guidance on suspecting and confirming the diagnosis of LPAC.

Main Methods:

• Clinical criteria for diagnosis include early symptom onset, recurrent biliary issues post-cholecystectomy, intrahepatic stones/sludge, prior intrahepatic cholestasis of pregnancy, and family history.
• Imaging techniques such as ultrasonography, CT, and MRI with MRCP are used to detect intrahepatic stones.
• Diagnosis is confirmed through ABCB4 gene genotyping.

Main Results:

• LPAC is associated with specific clinical and familial risk factors.
• Advanced imaging can identify intrahepatic stones and sludge characteristic of the condition.
• ABCB4 genotyping provides definitive diagnosis.

Conclusions:

• LPAC syndrome is a distinct genetic disorder requiring specific diagnostic considerations.
• Early diagnosis and management, primarily with ursodeoxycholic acid, can alleviate symptoms and prevent complications.
• While ursodeoxycholic acid is effective, surgical intervention may be necessary in some cases.