Acholuric Jaundice: Causes, Symptoms, Diagnosis & Treatment

Acholuric (Hemolytic) Jaundice: Causes, Symptoms, Diagnosis & Treatment | Unconjugated Hyperbilirubinemia

Learn about Acholuric Jaundice (Hemolytic Jaundice), its causes, hereditary factors, symptoms, diagnostic tests, complications like kernicterus, and updated treatment options including splenectomy.

Acholuric Jaundice (Hemolytic Jaundice): Updated Medical Review

Acholuric jaundice, also known as hemolytic jaundice, refers to jaundice caused by excessive destruction of red blood cells (hemolysis), leading to high levels of unconjugated bilirubin in the bloodstream. In this condition, bilirubin is not excreted in the urine, so urine remains normal in color, which is why it is termed “acholuric” (without bile pigment in urine).

This condition is often seen in hereditary disorders, especially Hereditary Spherocytosis, a genetic condition where red blood cells are fragile and break down early.

Causes and Risk Factors

Acholuric jaundice can be hereditary or acquired:

1] Hereditary Causes

Common hereditary cause:

• Hereditary Spherocytosis (Minkowski–Chauffard Disease)
  Red blood cells become spherical and are destroyed prematurely, especially in the spleen.

Other metabolic associations may include:

• Albinism
• Pentosuria
• Glycosuria
  (These arise due to enzyme deficiency affecting normal metabolic pathways.)

2] Acquired Causes

Also known as the Hayman–Widal Syndrome.

Acquired hemolysis occurs in:

• Malaria (especially Plasmodium falciparum)
• Mismatched blood transfusion
• Snake bites (Viperidae family)
• Autoimmune hemolytic anemia
• G6PD Deficiency triggered by drugs (e.g., sulfonamides, primaquine)
• Thalassemia and sickle cell anemia
• Hemolytic Uremic Syndrome

Pathophysiology

• Red blood cell breakdown releases hemoglobin → converted to unconjugated bilirubin.
• Unconjugated bilirubin is not water-soluble and circulates bound to albumin.
• It must be processed in the liver to become conjugated bilirubin.
• In hemolytic jaundice, the liver cannot keep up with high bilirubin production → unconjugated hyperbilirubinemia.

Since bilirubin is unconjugated (fat-soluble), it does not appear in urine, so urine remains pale or normal in color.

Symptoms

Infants may appear jaundiced soon after birth and require immediate evaluation.

Diagnosis

Diagnosis is made using:

1. Family history of similar anemia or jaundice.
2. Peripheral blood smear → presence of spherocytes.
3. Increased RBC fragility test (Osmotic Fragility Test).
4. Reticulocyte count → increased due to compensatory RBC production.
5. Serum bilirubin → elevated indirect (unconjugated) bilirubin.
6. Ultrasound → may show enlarged spleen or gallstones.

Complications

The most serious complication is:

Kernicterus (in newborns)

• Extremely high unconjugated bilirubin crosses the blood-brain barrier.
• Causes permanent brain damage, hearing loss, seizures, or death.

Therefore, newborns must be monitored closely for rising bilirubin levels.

Treatment

Patients typically experience dramatic improvement after splenectomy.

Key Points to Remember

• Urine is normal colored because bilirubin is unconjugated.
• Stools are dark due to increased stercobilinogen.
• Spleen enlargement is classic and common.
• Early diagnosis prevents severe bilirubin toxicity in newborns.

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