What is the name given to the excessive production of white blood cells leading to cancer

Options

A. leukemia
B. thrombosis
C. haemolysis
D. haemophilia

Explanation

### Step-by-Step Solution:

1. **Understanding White Blood Cells (WBCs)**:
- White blood cells, also known as leukocytes, are colorless cells that play a crucial role in the immune system. They help the body fight infections and diseases.

2. **Normal WBC Count**:
- The normal range for white blood cells in humans is approximately 5,000 to 11,000 cells per microliter (or cubic millimeter) of blood. This is significantly lower than the count of red blood cells (RBCs), which is around 4.5 to 5.5 million per cubic millimeter.

3. **Excessive Production of WBCs**:
- An abnormal increase in the number of white blood cells can occur in certain medical conditions, particularly cancers. This excessive production of WBCs is not just a minor increase but a significant one, often exceeding 50,000 cells per cubic millimeter.

4. **Identifying the Condition**:
- The condition characterized by this excessive production of white blood cells leading to cancer is known as **Leukemia**. It is a type of blood cancer that affects the blood and bone marrow.

5. **Differentiating Other Conditions**:
- Other terms mentioned in the context include:
- **Leukopenia**: A decrease in white blood cell count.
- **Thrombosis**: The formation of a blood clot.
- **Hemolysis**: The breakdown of red blood cells.
- **Hemophilia**: A condition where there is a deficiency in clotting factors, leading to excessive bleeding.

6. **Conclusion**:
- Based on the information provided, the correct answer to the question is **Leukemia**, as it specifically refers to the excessive production of white blood cells leading to cancer.