1. What is Absolute Lymph Count?

Absolute Lymph Count (ALC) is a measure of the total number of lymphocytes in the blood, adjusted for age. Lymphocytes are a type of white blood cell that play important roles in the immune system.

2. How Does the Calculator Work?

The calculator uses the ALC equation:

Where:

• \( WBC \) — White blood cell count (cells/μL)
• \( Lymph\% \) — Percentage of lymphocytes in differential count
• \( Age\ Factor \) — Adjustment factor based on patient age

Age Factors:

• Infants (<1 year): 1.8
• Toddlers (1-4 years): 1.5
• Children (5-11 years): 1.2
• Adults (12+ years): 1.0

3. Importance of ALC Calculation

Details: ALC is important for evaluating immune function, diagnosing lymphopenia or lymphocytosis, and monitoring conditions like HIV/AIDS or during chemotherapy.

4. Using the Calculator

Tips: Enter WBC count in cells/μL, lymphocyte percentage, and age in years. All values must be valid (WBC > 0, lymph % between 0-100, age ≥ 0).

5. Frequently Asked Questions (FAQ)

Q1: What is a normal ALC range?
A: Normal ranges vary by age: Adults 1,000-4,800 cells/μL; Children 3,000-9,500 cells/μL; Infants 4,000-13,500 cells/μL.

Q2: When is ALC considered low?
A: Generally <1,000 cells/μL in adults, though exact thresholds depend on clinical context.

Q3: What causes high ALC?
A: Viral infections, certain bacterial infections, lymphocytic leukemia, and chronic inflammatory conditions.

Q4: Why use age-adjusted factors?
A: Children normally have higher lymphocyte counts than adults, so age adjustment provides more meaningful interpretation.

Q5: How often should ALC be monitored?
A: Frequency depends on clinical situation - may range from daily in hospitalized patients to annually in routine checkups.