Check Your Genetic Health

Total Hexosaminidase and Hexosaminidase A Activity Test

This test provides a precise evaluation of Hexosaminidase enzyme activity, assisting in the early detection of rare genetic disorders like Tay-Sachs disease to ensure timely medical intervention and family health.

Trusted medical contentUpdated: 10-11-2026Views: 0LHL-6518

Frequently Asked Questions

Short answers to the FAQs published with this service.

• What is the Hexosaminidase enzyme test?

It is a test that measures the activity of specific proteins in the blood that break down fatty substances; deficiency leads to genetic disorders.

• Is fasting required for this test?

No, fasting is not required for this analysis, and it can be performed at any time of the day.

• Why do doctors order this test for children?

It is requested when symptoms like muscle weakness, loss of motor skills, or unexplained seizures are observed to evaluate neurological health.

• Can this test be performed at home?

Yes, home blood collection service is available through our platform for your convenience and privacy.

• What is the difference between Total and Type A?

Type A is specific for detecting Tay-Sachs disease, while the Total activity helps diagnose other disorders like Sandhoff disease.

• Does a normal result completely rule out the disease?

A normal result means enzyme activity is within safe limits; however, results should always be interpreted by a physician alongside symptoms.

Medical Laboratories

Check Your Genetic Health

Total Hexosaminidase and Hexosaminidase A Activity Test

Trusted medical contentUpdated: 10-11-2026Views: 0LHL-6518

View service availability

Service typeLaboratory test

Duration10-15 minutes

Fasting / preparationFasting is not required

Home serviceAvailable

Medical notice: this information is for education and service understanding. It is not a diagnosis or a recommendation for an unnecessary procedure.

About this service

A specialized laboratory test measuring total and type A Hexosaminidase levels in the blood. It is primarily used to diagnose inherited storage disorders affecting neurological functions and development in children and adults.

Purpose of the Procedure

Detecting hexosaminidase enzyme deficiency responsible for lipid processing in the brain.
Diagnosing Tay-Sachs disease and Sandhoff disease.
Identifying genetic carriers of these conditions.

Target Groups

Children showing developmental delays or neurological regression.
Couples planning marriage with a known family history of the disease.
Individuals with relatives affected by lysosomal storage disorders.

What Do the Results Measure?

Low Hexosaminidase A activity usually indicates Tay-Sachs disease.
Low activity in both (Total and A) may indicate Sandhoff disease.
Percentage levels help distinguish between a carrier and an affected individual.

What is included?

✓Venous blood sample collection
✓Total Hexosaminidase activity measurement
✓Hexosaminidase A activity measurement

Conditions and notices

Fasting is not required
No special fasting requirements
Preferable to inform the lab of any genetic family history

Frequently Asked Questions

Short answers to the FAQs published with this service.

• What is the Hexosaminidase enzyme test?

It is a test that measures the activity of specific proteins in the blood that break down fatty substances; deficiency leads to genetic disorders.

• Is fasting required for this test?

No, fasting is not required for this analysis, and it can be performed at any time of the day.

• Why do doctors order this test for children?

It is requested when symptoms like muscle weakness, loss of motor skills, or unexplained seizures are observed to evaluate neurological health.

• Can this test be performed at home?

Yes, home blood collection service is available through our platform for your convenience and privacy.

• What is the difference between Total and Type A?

Type A is specific for detecting Tay-Sachs disease, while the Total activity helps diagnose other disorders like Sandhoff disease.

• Does a normal result completely rule out the disease?

A normal result means enzyme activity is within safe limits; however, results should always be interpreted by a physician alongside symptoms.

Service resources and references

References and additional resources

Reference material and files associated with this service when available.

Scientific references

Saudi Society of Medical Genetics
Mayo Clinic

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Important Notice:

Content on LahaLak is provided for educational purposes only. It is not a medical diagnosis, prescription, or substitute for consulting a qualified clinician. Medical decisions should not be made from this content alone.

Content reviewed according to the LahaLak Quality Charter.Editorial Policy & Medical Standards

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