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TLC Test - Purpose, Normal Range, Procedure, Preparation

TLC Test - Purpose, Normal Range, Procedure, Preparation

Max Lab

Jun 06, 2023

Have you ever heard of the TLC test? The TLC test is a medical procedure that can reveal a lot about your health and well-being. If you're curious to learn more about this fascinating test and how it works, then keep reading! In this blog post, we'll dive into all things TLC - from what it is and how it's performed to what results you can expect. So sit tight and get ready to discover everything there is to know about the TLC test!

What is the TLC test?

The TLC test, also known as the Total Lymphocyte Count test, is a simple blood test that measures the number of lymphocytes in your blood. Lymphocytes are white blood cells that play an essential role in your immune system by helping to fight off infections and diseases.

Why Is TLC Test Done?

A low lymphocyte count can be an indication of various medical conditions such as HIV/AIDS, leukemia, autoimmune disorders or even malnutrition. Therefore, doctors usually order a TLC test to assess the overall health of your immune system.

Additionally, if you have recently undergone chemotherapy or radiation therapy for cancer treatment, a TLC test may be performed regularly to monitor how well your body is recovering and responding to treatment.

Who Should Get Tested For TLC Test?

So, who should get tested for the TLC Test? Individuals with recurring infections or prolonged illnesses might want to consider getting a TLC test done. Those undergoing chemotherapy or radiation therapy may also benefit from this test as both treatments tend to suppress the immune system.

Additionally, people with autoimmune disorders such as rheumatoid arthritis and lupus may require regular TLC tests as these conditions can affect lymphocyte counts. The same applies to individuals living with HIV/AIDS who need routine monitoring of their immune function.

On the other hand, healthy individuals without any underlying medical condition may not necessarily need to undergo a TLC Test unless recommended by their doctor for some reason. So if you are unsure whether you need one or not, it's best to consult your healthcare provider first before getting yourself tested.

How to Prepare for the TLC test

To ensure accurate results, preparation for a TLC test is crucial. Although the process is relatively simple, there are certain steps to follow to make sure you're ready for your appointment.

  • Firstly, it's important to inform your doctor of all medications and supplements you are currently taking, as some substances can affect the accuracy of the test. You may be required to stop taking certain medications or adjust their dosage before the test.
  • Secondly, fasting may also be necessary before your TLC test. Your healthcare provider will advise you on how long you need to fast and what foods or liquids should be avoided during this time.

It's essential to avoid engaging in any strenuous activities at least 24 hours before your appointment as physical activity can cause changes in blood pressure and heart rate which could affect the results of the test.

Understanding The TLC Test Result

Once you've taken the TLC test, your doctor will give you the results. Understanding these results can help you determine if there's anything wrong with your blood counts.

The TLC test measures three different types of white blood cells: neutrophils, lymphocytes, and monocytes. It also measures red blood cells and platelets.

In general, the normal range of white blood cell count or leukocyte count is between 4,000 and 11,000/microliter, depending on the individual's gender and age.

Your TLC count should fall within a normal range that depends on various factors such as age and sex. If your results are too high or too low, it could indicate an infection or other health condition.

An abnormally high number of white blood cells could be due to inflammation caused by allergies or autoimmune disorders. An abnormally low number could mean that you have a viral infection or damage to bone marrow.

It's important to discuss any abnormal results with your doctor so they can determine the best course of action for treatment. Your doctor may order additional tests to confirm a diagnosis before starting any treatments.

Time Required For TLC Test

The time required for a TLC test can vary depending on the specific type of test and the laboratory where it is being performed. In general, however, most tests take only a few minutes to complete.

During the test, a small sample of blood will be drawn from your arm using a needle. This process typically takes only a minute or two, but may cause some discomfort or minor pain.

Once the blood has been collected, it will be analyzed in a diagnostic lab to determine your TLC count. This analysis usually takes anywhere from 15 minutes to several hours depending on the complexity of the testing and which laboratory is handling your samples.

In some cases, you may need to wait several days for results if more extensive testing is needed or if there are delays in processing at the lab.


As we come to the end of this article, it's important to understand that the TLC test is a crucial medical examination that can help diagnose potential health issues. It's always better to get tested and catch any problems early on, rather than wait until they become more serious.

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