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Absolute Prolymphocyte Count (Manual Blood Count)

Published: August 9, 2026Updated: August 16, 2026

This test measures the number of prolymphocytes, a type of immature white blood cell, in your blood. It may be used to assess certain blood disorders or infections.

Quick summary

["Prolymphocytes are rare cells that can help diagnose specific blood conditions."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
6746-2
Short code
Prolymphocytes NFr Bld Manual
Synonyms
Prolymphocytes NFr Bld Manual
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
manual-count
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may order this test if you have symptoms like unexplained fatigue, frequent infections, or abnormal blood test results. It could also be part of a broader evaluation for conditions like leukemia or other hematologic disorders.

How the Test Works

A small sample of your blood is taken and examined under a microscope by a trained technician. The count of prolymphocytes is recorded manually, which provides detailed information about their presence in your bloodstream.

Sample Collection and Preparation

Blood is drawn from a vein, usually in your arm. The sample is processed and examined directly by a laboratory technician to count these cells accurately.

What to Expect Before the Test

There are no special preparations needed for this test. You may eat and drink as usual, but inform your provider about any medications or supplements you’re taking that could affect blood counts.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Prolymphocyte Count

Frequently asked questions

What does a high prolymphocyte count mean?
A high count could signal a rare blood disorder like prolymphocytic leukemia, where these immature white blood cells proliferate abnormally. Your doctor will review your full medical history and other test results to determine the cause.
How is this test different from a regular white blood cell count?
Unlike standard white blood cell counts, which measure all types of white blood cells, this test specifically focuses on prolymphocytes, an uncommon subset of immature white blood cells. It provides more detailed information for diagnosing specific conditions.
Can I eat or drink anything before this test?
Yes, you can eat and drink normally before this test. No special preparation is required, but let your healthcare provider know about any medications or supplements you’re taking that might affect blood tests.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy