Liver

Jaundice is caused by the breakdown of red blood cells.
Heme oxygenase is the key enzyme that splits the heme ring from hemoglobin, leading to the production of bilirubin.
Two forms of bilirubin: unconjugated (indirect) and conjugated (direct).

Not water-soluble; primarily produced from the breakdown of hemoglobin.
Common in neonates due to immature liver function.
Bilirubin acts as a neurotoxin in high concentrations, potentially leading to kernicterus, a serious condition in newborns.
Treatment involves light therapy to oxidize bilirubin and prevent its toxic effects.

Water-soluble; formed when unconjugated bilirubin undergoes conjugation in the liver.
Normal bilirubin levels include both forms in trace amounts.

Prehepatic: Conditions occurring before blood reaches the liver, often due to hemolysis (e.g., sickle cell anemia, thalassemia).
Intrahepatic: Occurs within the liver, such as liver diseases that interfere with bilirubin conjugation or discharge (e.g., Gilbert’s syndrome).
Posthepatic: Issues after liver processing, typically associated with obstruction in the biliary system (e.g., gallstones, tumors).

Signs of Hemolysis: Increased breakdown of red blood cells; can occur due to conditions like major bruises or snake bites.
Genetic Disorders: Gilbert’s syndrome causes elevated bilirubin levels without significant liver damage; common in those of Mediterranean descent.
Medication Effects: Some drugs (like phenothiazines) can induce hyperbilirubinemia.
Hormonal Effects: High sex hormones during pregnancy may mimic jaundice without underlying liver damage.

Liver Panel: Evaluates liver health based on enzyme levels.
Elevated AST vs. ALT: Indicates potential alcohol-related liver damage.
Elevated ALP: Suggests possible biliary obstruction or cancer.
Bilirubin Tests: Differentiate between conjugated and unconjugated levels, aiding in identifying the jaundice's source.

Caused by increased pressure in the portal veins, leading to potential ascites and gastroesophageal varices.
Symptoms include difficulty eating due to abdominal pain and risk of variceal bleeds, significant in cirrhosis patients.

Neuropsychiatric disorder resulting from liver dysfunction.
Can present acutely or chronically, causing symptoms from confusion to coma.
Management involves controlling dietary protein intake to reduce ammonia levels due to impaired liver detoxification.
Sedatives or medications that affect the liver should be used cautiously to avoid exacerbating the condition.

Hepatitis A and E: Typically self-limiting, usually fecal-oral transmission; unlikely to become chronic.
Hepatitis B and C: More serious, can lead to chronic diseases; transmitted via blood or bodily fluids.

Jaundice may occur with Hepatitis but is not guaranteed.
Diagnosis includes antibody testing to determine infection status.
Chronic infection may lead to serious liver damage and is associated with complications like cirrhosis and liver cancer.

Long-term liver disease (cirrhosis) can lead to increased risk for gastroesophageal varices, which can rupture and be fatal.
Chronic liver inflammation may derive from autoimmune responses, excessive alcohol intake, or metabolic issues.
Treatment: Patient management often involves careful monitoring, dietary management, and sometimes, medication to alleviate symptoms and prevent complications.