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Rhamnose (Urinary)

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

This test measures the presence of rhamnose, a sugar found in urine, which can help identify certain kidney or metabolic conditions.

Quick summary

["Rhamnose in urine may signal kidney problems or metabolic disorders."]

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

Key facts at a glance

LOINC
17531-5
Short code
Rh Amn
Synonyms
Rh Amn
Category
chemistry
Sample
fluid
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
2-5 mL
Stability
Room temperature: 2h, Refrigerated: 24h
Hemolysis max
300
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Doctors may order a rhamnose test if you have symptoms like frequent urination, swelling, or unexplained weight changes. It can also be part of evaluating kidney function or metabolic disorders, such as certain genetic conditions or diabetes-related kidney issues.

What Does a Positive Result Mean?

A positive result for rhamnose in urine often indicates kidney problems, such as **Fanconi syndrome** (a group of kidney disorders affecting how the kidneys filter waste) or other metabolic abnormalities. It may also appear in people with certain genetic conditions or diabetes.

What Does a Negative Result Mean?

A negative result means no detectable rhamnose was found in your urine, which may suggest normal kidney function or that the underlying cause isn’t related to rhamnose metabolism. However, further testing may still be needed to rule out other conditions.

How Is This Test Performed?

This test involves collecting a urine sample, typically a random or timed urine specimen. The sample is tested for the presence of rhamnose using specialized laboratory techniques, such as chromatography or immunoassay.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Rhamnose

Frequently asked questions

Why might my doctor ask for this test?
Your doctor may recommend this test if you have symptoms like polyuria (excessive urination), edema (swelling), or if they suspect a metabolic disorder, kidney dysfunction, or genetic condition affecting sugar metabolism. It can also be part of screening for conditions like **Fanconi syndrome** or **renal glycosuria** (a benign condition where sugar appears in urine).
What are the possible causes of a positive rhamnose test?
Positive results can occur due to kidney diseases (such as Fanconi syndrome), certain genetic disorders, or metabolic conditions like diabetes. Rarely, it may appear in people with normal kidney function but with specific metabolic issues. Always discuss your results with your healthcare provider.
Do I need to prepare for this test?
No special preparation is usually needed, but avoid excessive fluid intake before testing if instructed by your doctor. If you’re unsure, ask your healthcare provider for guidance.
  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