Types and Causes of Jaundice
Start with the big picture
Bilirubin is classified as unconjugated (indirect) or conjugated (direct), with differences in solubility and urinary excretion that help interpret jaundice. The main categories are pre-hepatic or hemolytic, hepatocellular, and post-hepatic or obstructive; each has characteristic causes and laboratory patterns. The topic also introduces neonatal jaundice, hereditary disorders affecting conjugation or excretion, and drug-induced cholestasis. Comparing bilirubin levels with urine bilirubin, urobilinogen, stool appearance, and liver enzymes provides a framework for distinguishing these patterns. These introductory relationships support further study of bilirubin metabolism and the diagnostic clues used to assess jaundice.
What you'll learn
- Distinguish unconjugated from conjugated bilirubin by solubility and urinary excretion.
- Compare common causes and laboratory patterns of hemolytic, hepatocellular, and obstructive jaundice.
- Relate urine and stool findings to the major jaundice categories.
- Recognize neonatal and hereditary forms of hyperbilirubinemia.
- Identify drug-induced cholestasis as a cause of jaundice.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
