Test Catalog

Test Name

Test ID: CBC    
CBC with Differential, Blood

Useful For Suggests clinical disorders or settings where the test may be helpful

Screening tool to confirm a hematologic disorder, to establish or rule out a diagnosis, to detect an unsuspected hematologic disorder, or to monitor effects of radiation or chemotherapy

Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

A morphology evaluation is performed at an additional charge when the automated 5-part differential is invalid or when abnormal results are identified upon microscopic examination.

 

A peripheral blood smear review is performed at an additional charge when pathologist expertise is needed for clinically significant diagnosis.

Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test

RBCs, WBCs, and platelets are produced in the bone marrow and released into the peripheral blood. The primary function of the RBC is to deliver oxygen to tissues. WBCs are key components of the immune system. Platelets play a vital role in blood clotting.

 

Mean corpuscular volume (MCV) is a measure of the size of the average RBC. Anemias are characterized as microcytic (MCV <80), macrocytic (MCV >100), or normocytic. The red cell distribution width (RDW) is a measure of the degree of variation in RBC size (anisocytosis). RDW may be helpful in distinguishing between some anemias. For example, iron deficiency anemia is characterized by a high RDW, while thalassemia is characterized by a low RDW.

 

These counts are used as clinical guides in the diagnosis or monitoring of many diseases.

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

RED BLOOD CELL COUNT (RBC)

Males:

0-14 days: 4.10-5.55 x 10(12)/L

15 days-4 weeks: 3.16-4.63 x 10(12)/L

5 weeks-7 weeks: 3.02-4.22 x 10(12)/L

8 weeks-5 months: 3.43-4.80 x 10(12)/L

6 months-23 months: 4.03-5.07 x 10(12)/L

24 months-35 months: 3.89-4.97 x 10(12)/L

3-5 years: 4.00-5.10 x 10(12)/L

6-10 years: 4.10-5.20 x 10(12)/L

11-14 years: 4.20-5.30 x 10(12)/L

15-17 years: 4.30-5.70 x 10(12)/L

Adults: 4.35-5.65 x 10(12)/L

 

Females:

0-14 days: 4.12-5.74 x 10(12)/L

15 days-4 weeks: 3.32-4.80 x 10(12)/L

5 weeks-7 weeks: 2.93-3.87 x 10(12)/L

8 weeks-5 months: 3.45-4.75 x 10(12)/L

6 months-23 months: 3.97-5.01 x 10(12)/L

24 months-35 months: 3.84-4.92 x 10(12)/L

3-5 years: 4.00-5.10 x 10(12)/L

6-10 years: 4.10-5.20 x 10(12)/L

11-14 years: 4.10-5.10 x 10(12)/L

15-17 years: 3.80-5.00 x 10(12)/L

Adults: 3.92-5.13 x 10(12)/L

 

HEMOGLOBIN

Males:

0-14 days: 13.9-19.1 g/dL

15 days-4 weeks: 10.0-15.3 g/dL

5 weeks-7 weeks: 8.9-12.7 g/dL

8 weeks-5 months: 9.6-12.4 g/dL

6 months-23 months: 10.1-12.5 g/dL

24 months-35 months: 10.2-12.7 g/dL

3-5 years: 11.4-14.3 g/dL

6-8 years: 11.5-14.3 g/dL

9-10 years: 11.8-14.7 g/dL

11-14 years: 12.4-15.7 g/dL

15-17 years: 13.3-16.9 g/dL

Adults: 13.2-16.6 g/dL

 

Females:

0-14 days: 13.4-20.0 g/dL

15 days-4 weeks: 10.8-14.6 g/dL

5 weeks-7 weeks: 9.2-11.4 g/dL

8 weeks-5 months: 9.9-12.4 g/dL

6 months-35 months: 10.2-12.7 g/dL

3-5 years: 11.4-14.3 g/dL

6-8 years: 11.5-14.3 g/dL

9-10 years: 11.8-14.7 g/dL

11-17 years: 11.9-14.8 g/dL

Adults: 11.6-15.0 g/dL

 

HEMATOCRIT

Males:

0-14 days: 39.8-53.6%

15 days-4 weeks: 30.5-45.0%

5 weeks-7 weeks: 26.8-37.5%

8 weeks-5 months: 28.6-37.2%

6 months-23 months: 30.8-37.8%

24 months-35 months: 31.0-37.7%

3-7 years: 34-42%

8-11 years: 35-43%

12-15 years: 38-47%

16-17 years: 40-50%

Adults: 38.3-48.6%

 

Females:

0-14 days: 39.6-57.2%

15 days-4 weeks: 32.0-44.5%

5 weeks-7 weeks: 27.7-35.1%

8 weeks-5 months: 29.5-37.1%

6 months-23 months: 30.9-37.9%

24 months-35 months: 31.2-37.8%

3-7 years: 34-42%

8-17 years: 35-43%

Adults: 35.5-44.9%

 

MEAN CORPUSCULAR VOLUME (MCV)

Males:

0-14 days: 91.3-103.1 fL

15 days-4 weeks: 89.4-99.7 fL

5 weeks-7 weeks: 84.3-94.2 fL

8 weeks-5 months: 74.1-87.5 fL

6 months-23 months: 69.5-81.7 fL

24 months-35 months: 71.3-84.0 fL

3-5 years: 77.2-89.5 fL

6-11 years: 77.8-91.1 fL

12-14 years: 79.9-93.0 fL

15-17 years: 82.5-98.0 fL

Adults: 78.2-97.9 fL

 

Females:

0-14 days: 92.7-106.4 fL

15 days-4 weeks: 90.1-103.0 fL

5 weeks-7 weeks: 83.4-96.4 fL

8 weeks-5 months: 74.8-88.3 fL

6 months-23 months: 71.3-82.6 fL

24 months-35 months: 72.3-85.0 fL

3-5 years: 77.2-89.5 fL

6-11 years: 77.8-91.1 fL

12-14 years: 79.9-93.0 fL

15-17 years: 82.5-98.0 fL

Adults: 78.2-97.9 3 fL

 

RED CELL DISTRIBUTION WIDTH (RDW)

Males:

0-14 days: 14.8-17.0%

15 days-4 weeks: 14.3-16.8%

5 weeks-7 weeks: 13.8-16.1%

8 weeks-5 months: 12.4-15.3%

6 months-23 months: 12.9-15.6%

24 months-35 months: 12.5-14.9%

3-5 years: 11.3-13.4%

6-17 years: 11.4-13.5%

Adults: 11.8-14.5%

 

Females:

0-14 days: 14.6-17.3%

15 days-4 weeks: 14.4-16.2%

5 weeks-7 weeks: 13.6-15.8%

8 weeks-5 months: 12.2-14.3%

6 months-23 months: 12.7-15.1%

24 months-35 months: 12.4-14.9%

3-5 years: 11.3-13.4%

6-17 years: 11.4-13.5%

Adults: 12.2-16.1%

 

WHITE BLOOD CELL COUNT (WBC)

Males:

0-14 days: 8.0-15.4 x 10(9)/L

15 days-4 weeks: 7.8-15.9 x 10(9)/L

5 weeks-7 weeks: 8.1-15.0 x 10(9)/L

8 weeks-5 months: 6.5-13.3 x 10(9)/L

6 months-23 months: 6.0-13.5 x 10(9)/L

24 months-35 months: 5.1-13.4 x 10(9)/L

3-5 years: 4.4-12.9 x 10(9)/L

6-17 years: 3.8-10.4 x 10(9)/L

Adults: 3.4-9.6 x 10(9)/L

 

Females:

0-14 days: 8.2-14.6 x 10(9)/L

15 days-4 weeks: 8.4-14.4 x 10(9)/L

5 weeks-7 weeks: 7.1-14.7 x 10(9)/L

8 weeks-5 months: 6.0-13.3 x 10(9)/L

6 months-23 months: 6.5-13.0 x 10(9)/L

24 months-35 months: 4.9-13.2 x 10(9)/L

3-5 years: 4.4-12.9 x 10(9)/L

6-17 years: 3.8-10.4 x 10(9)/L

Adults: 3.4-9.6 x 10(9)/L

 

PLATELETS

Males:

0-14 days: 218-419 x 10(9)/L

15 days-4 weeks: 248-586 x 10(9)/L

5 weeks-7 weeks: 229-562 x 10(9)/L

8 weeks-5 months: 244-529 x 10(9)/L

6 months-23 months: 206-445 x 10(9)/L

24 months-35 months: 202-403 x 10(9)/L

3-5 years: 187-445 x 10(9)/L

6-9 years: 187-400 x 10(9)/L

10-13 years: 177-381 x 10(9)/L

14-17 years: 139-320 x 10(9)/L

Adults: 135-317 x 10(9)/L

 

Females:

0-14 days: 144-449 x 10(9)/L

15 days-4 weeks: 279-571 x 10(9)/L

5 weeks-7 weeks: 331-597 x 10(9)/L

8 weeks-5 months: 247-580 x 10(9)/L

6 months-23 months: 214-459 x 10(9)/L

24 months-35 months: 189-394 x 10(9)/L

3-5 years: 187-445 x 10(9)/L

6-9 years: 187-400 x 10(9)/L

10-13 years: 177-381 x 10(9)/L

14-17 years: 158-362 x 10(9)/L

Adults: 157-371 x 10(9)/L

 

NEUTROPHILS

Males:

0-14 days: 1.60-6.06 x 10(9)/L

15 days-4 weeks: 1.18-5.45 x 10(9)/L

5 weeks-7 weeks: 0.83-4.23 x 10(9)/L

8 weeks-5 months: 0.97-5.45 x 10(9)/L

6 months-23 months: 1.19-7.21 x 10(9)/L

24 months-35 months: 1.54-7.92 x 10(9)/L

3-5 years: 1.60-7.80 x 10(9)/L

6-16 years: 1.40-6.10 x 10(9)/L

17 years: 1.80-7.20 x 10(9)/L

Adults: 1.56-6.45 x 10(9)/L

 

Females:

0-14 days: 1.73-6.75 x 10(9)/L

15 days-4 weeks: 1.23-4.80 x 10(9)/L

5 weeks-7 weeks: 1.00-4.68 x 10(9)/L

8 weeks-5 months: 1.04-7.20 x 10(9)/L

6 months-23 months: 1.27-7.18 x 10(9)/L

24 months-35 months: 1.60-8.29 x 10(9)/L

3-5 years: 1.60-7.80 x 10(9)/L

6-14 years: 1.50-6.50 x 10(9)/L

15-17 years: 2.00-7.40 x 10(9)/L

Adults: 1.56-6.45 x 10(9)/L

 

LYMPHOCYTES

Males:

0-14 days: 2.07-7.53 x 10(9)/L

15 days-4 weeks: 2.11-8.38 x 10(9)/L

5 weeks-7 weeks: 2.47-7.95 x 10(9)/L

8 weeks-5 months: 2.45-8.89 x 10(9)/L

6 months-23 months: 1.56-7.83 x 10(9)/L

24 months-35 months: 1.13-5.52 x 10(9)/L

3-5 years: 1.60-5.30 x 10(9)/L

6-11 years: 1.40-3.90 x 10(9)/L

12-17 years: 1.00-3.20 x 10(9)/L

Adults: 0.95-3.07 x 10(9)/L

 

Females:

0-14 days: 1.75-8.00 x 10(9)/L

15 days-4 weeks: 2.42-8.20 x 10(9)/L

5 weeks-7 weeks: 2.29-9.14 x 10(9)/L

8 weeks-5 months: 2.14-8.99 x 10(9)/L

6 months-23 months: 1.52-8.09 x 10(9)/L

24 months-35 months: 1.25-5.77 x 10(9)/L

3-5 years: 1.60-5.30 x 10(9)/L

6-11 years: 1.40-3.90 x 10(9)/L

12-17 years: 1.00-3.20 x 10(9)/L

Adults: 0.95-3.07 x 10(9)/L

 

MONOCYTES

Males:

0-14 days: 0.52-1.77 x 10(9)/L

15 days-4 weeks: 0.28-1.38 x 10(9)/L

5 weeks-7 weeks: 0.28-1.05 x 10(9)/L

8 weeks-5 months: 0.28-1.07 x 10(9)/L

6 months-23 months: 0.25-1.15 x 10(9)/L

24 months-35 months: 0.19-0.94 x 10(9)/L

3-5 years: 0.30-0.90 x 10(9)/L

6-17 years: 0.20-0.80 x 10(9)/L

Adults: 0.26-0.81 x 10(9)/L

 

Females:

0-14 days: 0.57-1.72 x 10(9)/L

15 days-4 weeks: 0.42-1.21 x 10(9)/L

5 weeks-7 weeks: 0.28-1.21 x 10(9)/L

8 weeks-5 months: 0.24-1.17 x 10(9)/L

6 months-23 months: 0.26-1.08 x 10(9)/L

24 months-35 months: 0.24-0.92 x 10(9)/L

3-5 years: 0.30-0.90 x 10(9)/L

6-17 years: 0.20-0.80 x 10(9)/L

Adults: 0.26-0.81 x 10(9)/L

 

EOSINOPHILS

Males:

0-14 days: 0.12-0.66 x 10(9)/L

15 days-4 weeks: 0.08-0.80 x 10(9)/L

5 weeks-7 weeks: 0.05-0.57 x 10(9)/L

8 weeks-5 months: 0.03-0.61 x 10(9)/L

6 months-23 months: 0.02-0.82 x 10(9)/L

24 months-35 months: 0.03-0.53 x 10(9)/L

3-11 years: 0.00-0.50 x 10(9)/L

12-17 years: 0.10-0.20 x 10(9)/L

Adults: 0.03-0.48 x 10(9)/L

 

Females:

0-14 days: 0.09-0.64 x 10(9)/L

15 days-4 weeks: 0.06-0.75 x 10(9)/L

5 weeks-7 weeks: 0.04-0.63 x 10(9)/L

8 weeks-5 months: 0.02-0.74 x 10(9)/L

6 months-23 months: 0.02-0.58 x 10(9)/L

24 months-35 months: 0.03-0.46 x 10(9)/L

3-11 years: 0.00-0.50 x 10(9)/L

12-17 years: 0.10-0.20 x 10(9)/L

Adults: 0.03-0.48 x 10(9)/L

 

BASOPHILS

Males:

0-14 days: 0.02-0.11 x 10(9)/L

15 days-7 weeks: 0.01-0.07 x 10(9)/L

8 weeks-35 months: 0.01-0.06 x 10(9)/L

3-17 years: 0.00-0.10 x 10(9)/L

Adults: 0.01-0.08 x 10(9)/L

 

Females:

0-14 days: 0.02-0.07 x 10(9)/L

15 days-4 weeks: 0.01-0.06 x 10(9)/L

5 weeks-7 weeks: 0.01-0.05 x 10(9)/L

8 weeks-5 months: 0.01-0.07 x 10(9)/L

6 months-35 months: 0.01-0.06 x 10(9)/L

3-17 years: 0.00-0.10 x 10(9)/L

Adults: 0.01-0.08 x 10(9)/L

Interpretation Provides information to assist in interpretation of the test results

Results outside of normal value ranges may reflect a primary disorder of the cell-producing organs or an underlying disease. Results should be interpreted in conjunction with the patient's clinical picture and appropriate additional testing performed.

Cautions Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances

Questionable results are detected by in-house checking criteria based on quantitative and qualitative parameters.

 

Defined laboratory instrument or patient flagging criteria may trigger peripheral blood smear review resulting in consultant readout of hematologic abnormalities.

Clinical Reference Recommendations for in-depth reading of a clinical nature

1. Adel K, Raizman J, Chen Y, et al: Complex biological profile of hematologic markers across pediatric, adult, and geriatric ages: establishment of robust pediatric and adult reference intervals on the basis of the Canadian Health Measures Survey. Clin Chem 2015;61:8

2. CLSI. Defining, Establishing, and Verifying Reference Intervals in the Clinical Laboratory; Approved Guideline, Third Edition. CLSI document EP28-A3c. Wayne, PA, Clinical and Laboratory Standards Institute, 2008

3. Soldin J, Brugnara C, Wong EC: Pediatric Reference Intervals. Fifth Edition. AACC Press. Washington, DC, 2005. ISBN 1-594250-32-4