Evaluation and Management of Conjugated Hyperbilirubinemia

Introduction to Conjugated Hyperbilirubinemia

The presence of bilirubin in urine is incompatible with pure unconjugated hyperbilirubinemia, as only conjugated bilirubin can be filtered by the kidneys, indicating a significant component of conjugated hyperbilirubinemia that requires immediate investigation 1, 2

A complete hepatic profile, including transaminases (ALT, AST) to evaluate hepatocellular damage, should be performed immediately, as indicated by the American Gastroenterological Association 4, 1
The American Association for the Study of Liver Diseases recommends serology for hepatitis A, B, and C, as well as consideration of hepatitis E and Epstein-Barr virus, if clinically suspected 4, 3

Hepatitis viral aguda, such as hepatitis A, B, C, E, or Epstein-Barr virus, can cause hepatocellular dysfunction with elevated conjugated bilirubin, as suggested by the European Association for the Study of the Liver 3
Hepatitis autoinmune can present in adolescents with immunologically mediated hepatocellular damage, affecting bilirubin processing and causing conjugated hyperbilirubinemia, according to the American Association of Clinical Endocrinologists 3

Ultrasonido abdominal is the initial study of choice, with a sensitivity of 65-95% for parenchymal liver disease and a positive predictive value of 98% for hepatobiliary pathology, as recommended by the Society of Radiologists in Ultrasound 2, 1

The American College of Gastroenterology recommends that once the cause is identified, specific management should be initiated, including treatment of support, consideration of specific antivirals for viral hepatitis, and immunosuppression for autoimmune hepatitis 3
The European Society of Gastrointestinal Endoscopy suggests that for drug-induced liver injury, immediate suspension of the causal agent is necessary, and for biliary obstruction, decompression via ERCP or surgery may be required, depending on the cause 2, 3