Absolute Lymphocyte Count Results
Severely reduced lymphocyte count
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Evidence-based calculations Used in clinical settings worldwide Regular monitoring recommended
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Why: This calculation helps assess important health parameters for clinical and personal wellness tracking.
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๐ฆ Acute Viral Infection
Young adult with EBV mononucleosis showing reactive lymphocytosis
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๐ด HIV-Positive Patient
HIV patient with lymphopenia and low CD4 count requiring monitoring
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๐ Post-Chemotherapy Patient
Cancer patient with severe lymphopenia following chemotherapy
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โ ๏ธ CLL Suspected
Elderly patient with persistent lymphocytosis suspicious for CLL
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๐ถ Healthy Child
Routine CBC in a healthy 4-year-old with age-appropriate lymphocyte count
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Sample Clinical Scenarios
๐ฆ Acute Viral Infection
Young adult with EBV mononucleosis showing reactive lymphocytosis
Click to use this example
๐ด HIV-Positive Patient
HIV patient with lymphopenia and low CD4 count requiring monitoring
Click to use this example
๐ Post-Chemotherapy Patient
Cancer patient with severe lymphopenia following chemotherapy
Click to use this example
โ ๏ธ CLL Suspected
Elderly patient with persistent lymphocytosis suspicious for CLL
Click to use this example
๐ถ Healthy Child
Routine CBC in a healthy 4-year-old with age-appropriate lymphocyte count
Click to use this example
Enter Lab Values
RequiredCBC Values
Patient Demographics
Clinical Context
Medical History
Total white blood cell count from CBC
Lymphocyte percentage from differential
Patient age for reference range interpretation
Age group affects normal reference ranges
Patient gender
Main presenting symptoms
Current fever
Recent or current infections
Known HIV status
Known autoimmune conditions
Medications affecting lymphocytes
Recent chemotherapy treatment
Known immunocompromised state
CD4+ T-cell count (cells/ฮผL)
CD8+ T-cell count (cells/ฮผL)
For informational purposes only โ not medical advice. Consult a healthcare professional before acting on results.
๐ฅ Health Facts
โ WHO
โ CDC
What is Absolute Lymphocyte Count (ALC)?
The Absolute Lymphocyte Count (ALC) measures the total number of lymphocytes in the blood per microliter. Lymphocytes are crucial white blood cells of the adaptive immune system, including T cells, B cells, and natural killer (NK) cells. The ALC provides a more accurate assessment of lymphocyte status than the percentage alone, especially when total WBC is abnormal.
T Lymphocytes
T cells coordinate immune responses (helper T cells) and directly kill infected cells (cytotoxic T cells). CD4+ and CD8+ are key subtypes.
B Lymphocytes
B cells produce antibodies and form the basis of humoral immunity. They also function as memory cells for long-term protection.
NK Cells
Natural killer cells provide rapid innate immune responses against tumors and virus-infected cells without prior sensitization.
How to Calculate ALC
ALC Formula
Example: WBC 7,000 ร 35% รท 100 = 2,450 cells/ฮผL
Age-Specific Ranges
- Infants: 3,000-9,500 cells/ฮผL
- Toddlers: 2,000-8,000 cells/ฮผL
- Children: 1,500-6,500 cells/ฮผL
- Adults: 1,000-4,800 cells/ฮผL
Why Age Matters
Children naturally have higher lymphocyte counts. A value that's normal for a child may indicate lymphocytosis in an adult.
When to Check ALC
HIV Monitoring
ALC and CD4 counts are crucial for monitoring HIV progression and treatment response.
Chemotherapy
Monitor lymphopenia during cancer treatment to assess infection risk.
Leukemia Screening
Persistent lymphocytosis may indicate CLL or other lymphoproliferative disorders.
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