🩸 Acanthocytosis refers to the presence of acanthocytes (spur cells) - red blood cells with irregular, spiculated membranes.
⚠️ Seen in both inherited syndromes and acquired systemic disease, it is a valuable diagnostic clue.
Causes of Acanthocytosis
- Inherited Disorders:
- 🧬 Abetalipoproteinemia (Bassen–Kornzweig syndrome): rare AR disorder → fat absorption/transport defect.
- 🧠 Neuroacanthocytosis syndromes: includes chorea-acanthocytosis and McLeod syndrome → progressive neurological + haematological features.
- Acquired Conditions:
- 🍷 Liver disease: esp. advanced cirrhosis; abnormal lipid composition of RBC membrane.
- 🥗 Malnutrition: esp. severe vitamin E deficiency due to fat malabsorption.
- 🦋 Hypothyroidism: thyroid hormone deficiency alters lipid metabolism → spur cells.
🩺 Clinical Features
- Neurological:
- 🌀 Movement disorders (chorea, dystonia, rigidity).
- 🦵 Peripheral neuropathy (numbness, tingling, weakness).
- 🧠 Cognitive impairment (memory loss, behavioural change).
- Haematological:
- 😴 Haemolytic anaemia → fatigue, pallor, jaundice.
- 🟠 Splenomegaly → worsens red cell destruction.
- Gastrointestinal:
- 💩 Malabsorption: diarrhoea, steatorrhoea, weight loss.
- 🧴 Fat-soluble vitamin deficiencies (A, D, E, K) → night blindness, osteomalacia, neuropathy, coagulopathy.
Diagnosis
- Peripheral blood smear: shows acanthocytes (spur cells with irregular projections).
- CBC: normocytic anaemia, ↑ reticulocytes in haemolysis.
- Iron studies & LFTs: evaluate for chronic disease or liver dysfunction.
- Lipid profile: low cholesterol/triglycerides in abetalipoproteinaemia.
- Genetic testing: confirms hereditary syndromes.
- Neurological assessment: screens for associated cognitive/motor features.
Treatment
- Underlying cause:
- 🍷 Treat liver disease (transplant if advanced cirrhosis with spur-cell anaemia).
- 🥗 Vitamin E supplementation in abetalipoproteinaemia/malabsorption.
- 🦋 Thyroxine replacement in hypothyroidism.
- Supportive care:
- 💪 Physiotherapy for motor symptoms.
- 🗣️ Speech/swallow therapy if bulbar involvement.
- 🍽️ Nutritional support + fat-soluble vitamin replacement.
- 🩸 Transfusion support if severe haemolysis.
Summary
🔑 Acanthocytosis is a morphological red-cell abnormality linked to lipid metabolism defects, liver dysfunction, and neurodegenerative syndromes.
🧾 Diagnosis relies on blood smear, biochemical work-up, and genetics.
💊 Management is supportive + correction of underlying disease, with vitamin E crucial in inherited forms.
