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Marble Red Blood Cell Morphology Qualitative Screening (Serum/Plasma)

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

This test evaluates the shape, size, and overall appearance of red blood cells (RBCs) in your blood sample. It helps identify abnormalities that may indicate conditions like anemia, infections, or blood disorders.

Quick summary

["A simple blood test to check for unusual RBC shapes that could signal underlying health concerns."]

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

Key facts at a glance

LOINC
75019-0
Short code
t(ABL1,BCR)e1a2 Mar Ql
Synonyms
t(ABL1,BCR)e1a2 Mar Ql
Category
coagulation
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Doctors may order this test if you have symptoms like fatigue, pale skin, unusual bruising, or unexplained bleeding. It’s also used to monitor conditions affecting RBCs, such as certain blood disorders or chronic illnesses.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm to draw blood. The test involves examining the blood sample under a microscope for any irregularities in RBCs.

What the Results Mean

Results are qualitative (descriptive rather than numerical). They may show normal RBCs, or they may highlight abnormal shapes (e.g., spherocytes, elliptocytes) that warrant further investigation.

Common Conditions Linked to RBC Abnormalities

Abnormal RBCs can signal conditions like hereditary spherocytosis, thalassemia, or certain infections. Your doctor will discuss findings with you and may recommend additional tests if needed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Morphology Screen (Serum/Plasma)

Frequently asked questions

What causes abnormal RBC shapes?
Abnormal RBC shapes can result from genetic disorders, certain medications, infections, or autoimmune diseases. Your doctor will consider your symptoms, medical history, and other test results to determine the cause.
How long does it take to get results?
Results are typically available within 24 to 48 hours, depending on your lab’s processing time. Your healthcare provider will contact you with the findings.
Can I fast before this test?
No fasting is required for this test. However, always follow your doctor’s instructions for any specific preparations.
  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