Conditions · Metabolism (biochemistry)
Gaucher disease !
In Gaucher disease macrophages fill with an undigested lipid; the spleen and liver grow, platelets fall and bones are damaged.
Updated 2026-11-01
Structures involved
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In biochemistry
- Lysosomal ganglioside breakdown: Step 5 · Glucocerebrosidase (acid β-glucosidase, GBA1)
- Sphingolipids and sphingolipidoses
- Lysosomal storage diseases
- Ceramide
- Glucosylceramide (glucocerebroside)
- Glucocerebrosidase (acid β-glucosidase)
In histology
Why it happens
- How a single gene causes disease: enzymes, receptors and structural proteins
- Intracellular accumulations: cholesterol, proteins, hyaline, glycogen
What it is
An autosomal recessive sphingolipidosis caused by glucocerebrosidase deficiency (GBA1 gene). It is the most common lysosomal storage disease.
Who gets it
It affects 1 in 50,000 to 100,000 people in the general population and is much more common in people of Ashkenazi Jewish descent. Type 1 is the most frequent; in Colombia and Latin America it is mostly found through splenomegaly with low blood counts.
Causes
- Biallelic variants of the GBA1 gene (autosomal recessive)
- Rarely, saposin C deficiency (PSAP gene) with a normal enzyme
Risk factors
- Carrier parents or an affected sibling
- Ashkenazi Jewish ancestry (type 1)
Pathophysiology
Without glucocerebrosidase, glucosylceramide from the membranes of old blood cells stays in macrophage lysosomes. The macrophages become Gaucher cells ("crumpled tissue paper" cytoplasm) that infiltrate spleen, liver and bone marrow. Marrow infiltration crowds out blood cell production (anaemia, thrombocytopenia) and damages bone (infarcts, avascular necrosis, osteopenia). In types 2 and 3, toxic glucosylsphingosine injures neurons.
Classification
- Type 1, non-neuronopathic: visceral and bone disease, at any age
- Type 2, acute neuronopathic: infants, very severe
- Type 3, chronic neuronopathic: visceral plus slow neurological disease (horizontal gaze palsy)
Symptoms and signs
- Large abdomen from splenomegaly and hepatomegaly
- Tiredness and pallor from anaemia
- Bruising and gum or nose bleeding from low platelets
- Episodes of severe bone pain
- Fractures after minor trauma
- Poor growth in children
Diagnosis
- Clinical
- Splenomegaly with low blood counts, bone pain or fractures; poor growth in children; look for slow saccadic eye movements (type 3).
- Tests
- Blood count (anaemia, thrombocytopenia); low glucocerebrosidase activity in leukocytes or dried blood spots; GBA1 genotyping; biomarkers (glucosylsphingosine, chitotriosidase); marrow aspirate shows Gaucher cells but is not needed for diagnosis.
- Imaging
- Abdominal MRI for spleen and liver volume; femur MRI for marrow infiltration and avascular necrosis; X-ray with the "Erlenmeyer flask" distal femur; bone densitometry.
Treatment
- Medical
- Intravenous enzyme replacement with mannose-exposed recombinant glucocerebrosidase: shrinks organs, improves blood counts and bone.
- Medical
- Oral substrate reduction therapy (eliglustat or miglustat) for selected adults with type 1.
- Surgical
- Joint replacement for advanced avascular necrosis of the hip; splenectomy is now rarely used.
- Follow-up
- Regular blood counts, biomarkers, organ volumes and bone MRI; watch for parkinsonian symptoms in adults.
Complications
- Avascular necrosis of the femoral head
- Pathological fractures and osteoporosis
- Pulmonary hypertension
- Higher risk of multiple myeloma and Parkinson disease
- Splenic infarction
Prognosis
With treatment, type 1 allows a near-normal life. Type 2 is usually fatal in the first years; type 3 has an intermediate course.
Test yourself
Think of the answer, then tap the question to see it.
Which enzyme is missing in Gaucher disease, and what builds up?
Glucocerebrosidase (GBA1); glucosylceramide accumulates in macrophages.
How does a Gaucher cell look under the microscope?
A large macrophage with "crumpled tissue paper" cytoplasm from lipid-filled lysosomes.
Which bone deformity is typical of Gaucher disease on X-ray?
The "Erlenmeyer flask" distal femur, from failed remodelling of the metaphysis.
Which type of Gaucher disease spares the nervous system?
Type 1 (non-neuronopathic), the most common.
Related conditions
Educational information, not medical advice. For any symptom, see a health professional.
Sources: Gaucher disease: MedlinePlus Genetics (MedlinePlus, US National Library of Medicine, 2026); GBA1 gene: MedlinePlus Genetics (MedlinePlus, US National Library of Medicine, 2026); Textbook of Biochemistry for Medical Students, 6th ed. (Jaypee Brothers Medical Publishers (Vasudevan DM, Sreekumari S, Vaidyanathan K), 2011).
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