Lymphoscintigraphy for Lymphedema

【Introduction】

Choosing the right treatment for lymphedema begins with understanding how the lymphatic system is functioning inside the body, not only how much swelling is visible.

Lymphoscintigraphy is internationally recognized as the gold standard imaging test for diagnosing lymphedema.

It provides objective, whole-limb functional information about lymphatic flow, lymph node activity, dermal backflow, and the severity of lymphatic obstruction—insights that cannot be obtained through physical examination alone.

 

At Lymphedema Clinic Tokyo, we use lymphoscintigraphy as part of a comprehensive, multimodal evaluation, together with ICG lymphography and lymphatic ultrasound, to determine the most appropriate and safest treatment strategy for each patient.

This integrated approach allows us to preserve and maximize remaining lymphatic function and to plan personalized care, including conservative management and lymphaticovenular anastomosis (LVA) when appropriate.

 

For international patients, we offer online consultations to review lymphoscintigraphy results obtained in your home country.

If lymphoscintigraphy is not available where you live, we can also help arrange the examination at our clinic in Tokyo.

 

This page explains:

What lymphoscintigraphy can (and cannot) show

Why it is essential for accurate diagnosis and staging

How it supports evidence-based, individualized lymphedema care

 

When living with lymphedema, understanding how your lymphatic system is functioning internally is essential for choosing the most appropriate and safest treatment.

At Lymphedema Clinic Tokyo, we believe that treatment decisions should never rely on a single test.

Instead, we use a comprehensive, multimodal diagnostic approach to fully understand each patient’s condition and remaining lymphatic function.

One of the most important components of this evaluation is lymphoscintigraphy, which is internationally recognized as the gold standard imaging test for diagnosing lymphedema.

 

🔷 What Is Lymphoscintigraphy?

Lymphoscintigraphy is a nuclear medicine imaging test that evaluates the functional flow of lymphatic fluid.

A small amount of radioactive tracer is injected into the skin, and its movement through lymphatic vessels and lymph nodes is recorded over time.

This allows clinicians to assess:

Whether lymphatic flow is delayed or obstructed

Whether lymph nodes are functioning properly

Whether lymphatic fluid is refluxing into the skin (dermal backflow)

The overall severity and pattern of lymphatic dysfunction

Unlike physical examination alone, lymphoscintigraphy provides objective, whole-limb functional information.

 

🔷 Why Lymphoscintigraphy Is Considered the Gold Standard

Based on extensive international research, including large clinical studies and review articles, lymphoscintigraphy:

Has high diagnostic accuracy for lymphedema

Allows functional (not just anatomical) assessment

Provides stable and reproducible results when performed with standardized protocols

Helps distinguish lymphedema from other causes of limb swelling

For these reasons, lymphoscintigraphy remains the reference standard worldwide for diagnosing and staging lymphedema.

 

🔷 How We Use Lymphoscintigraphy at Lymphedema Clinic Tokyo

At Lymphedema Clinic Tokyo, lymphoscintigraphy is never used in isolation.

We determine treatment strategies only after combining results from:

Lymphoscintigraphy – to evaluate global lymphatic function

ICG lymphography – to visualize superficial lymphatic vessels

Lymphatic ultrasound – to assess lymphatic vessels and veins in greater detail, including deeper structures

This integrated approach allows us to maximize each patient’s remaining lymphatic function and plan treatment with greater precision.

 

🔷 About ICG Lymphography and Its Limitations

ICG lymphography is an excellent imaging tool and is widely used to guide lymphaticovenular anastomosis (LVA) surgery.

However, ICG lymphography can visualize lymphatic vessels only to a depth of approximately 1 cm from the skin surface.

This means that deeper lymphatic vessels and veins cannot be fully evaluated with ICG alone.

For this reason, some institutions perform LVA surgery based solely on ICG findings, but this approach has inherent limitations.

By combining:

Lymphoscintigraphy (deep, global functional assessment), and

Lymphatic ultrasound (detailed evaluation of both lymphatic vessels and veins),

we are able to perform more reliable, safer, and function-preserving LVA surgery.

 

🔷 Lymphoscintigraphy Staging Used at Our Clinic

When interpreting lymphoscintigraphy results, we use the Maegawa classification, which categorizes lymphoscintigraphy patterns based on lymphatic obstruction and dermal backflow.

This classification helps us understand:

Whether lymphatic pathways remain functional

The extent of lymphatic obstruction

Which treatment options may be appropriate

It also provides a common language for discussing results during consultation.

 

🔷 Online Consultation for International Patients

For patients living outside Japan, we offer online consultations.

During the online consultation:

We review your lymphoscintigraphy results

We explain what the findings mean in clear, understandable terms

We discuss potential treatment strategies at our clinic

ICG lymphography and lymphatic ultrasound are performed in person at our clinic in Tokyo, if you decide to proceed with further evaluation or treatment.

 

🔷 If Lymphoscintigraphy Is Not Available in Your Country

Because lymphoscintigraphy is the international gold standard, we strongly recommend undergoing this test whenever possible.

If lymphoscintigraphy is not available or difficult to arrange in your country,

we can help schedule the examination at Lymphedema Clinic Tokyo as part of your visit.

Our team will assist with coordination to ensure the process is as smooth as possible.

 

🔷 Our Philosophy: Using the Right Test for the Right Purpose

At Lymphedema Clinic Tokyo, our goal is not simply to perform procedures, but to:

Understand your individual lymphatic condition

Use objective, evidence-based diagnostics

Preserve and utilize your remaining lymphatic function

Provide realistic, personalized treatment planning

This philosophy is strongly supported by international research on lymphoscintigraphy and lymphedema care.

 

🔷 In Summary

Lymphoscintigraphy is the international gold standard for diagnosing lymphedema

No single test is sufficient for treatment planning

Combining lymphoscintigraphy, ICG lymphography, and lymphatic ultrasound allows for more accurate and safer care

Online consultation is available for international patients

Lymphoscintigraphy can be arranged at our clinic if needed

 

【Frequently Asked Questions (FAQ)】

Lymphoscintigraphy and Multimodal Evaluation at Lymphedema Clinic Tokyo

 

Q1. What is lymphoscintigraphy, and why is it important for lymphedema?

Lymphoscintigraphy is a nuclear medicine imaging test that evaluates how lymphatic fluid flows through the body.

It is internationally recognized as the gold standard test for diagnosing lymphedema.

This examination allows us to assess lymphatic function objectively, including lymphatic flow delay, obstruction, lymph node function, and dermal backflow—information that cannot be obtained from physical examination alone.

 

 

Q2. Why do you recommend lymphoscintigraphy even if other tests are available?

While several imaging methods are useful in lymphedema care, lymphoscintigraphy remains the reference standard worldwide because it evaluates global and deep lymphatic function in a stable and reproducible manner.

It helps confirm the diagnosis, assess severity, and support evidence-based treatment planning.

 

 

Q3. What is the difference between lymphoscintigraphy and ICG lymphography?

ICG lymphography is an excellent tool for visualizing superficial lymphatic vessels, especially for surgical planning.

However, ICG lymphography can visualize lymphatic structures only up to approximately 1 cm beneath the skin.

Deeper lymphatic vessels and veins cannot be fully evaluated using ICG alone.

Lymphoscintigraphy, on the other hand, provides a whole-limb functional assessment, including deeper lymphatic pathways.

 

 

Q4. Why does Lymphedema Clinic Tokyo use lymphatic ultrasound as well?

Lymphatic ultrasound allows us to evaluate:

The size, depth, and condition of lymphatic vessels

The anatomy and quality of nearby veins

Deeper structures that cannot be assessed with ICG lymphography

By combining ultrasound with lymphoscintigraphy and ICG lymphography, we can plan treatment more safely and precisely.

 

 

Q5. Why do you use multiple imaging tests instead of just one?

No single imaging test can fully evaluate the lymphatic system.

At Lymphedema Clinic Tokyo, we use a multimodal approach:

Lymphoscintigraphy for global functional assessment

ICG lymphography for superficial lymphatic mapping

Lymphatic ultrasound for detailed evaluation of lymphatic vessels and veins

This approach helps us maximize remaining lymphatic function and avoid unnecessary or inappropriate procedures.

 

 

Q6. How are lymphoscintigraphy results interpreted at your clinic?

We interpret lymphoscintigraphy findings using the Maegawa classification, which categorizes lymphatic obstruction patterns based on functional impairment and dermal backflow.

This classification helps us understand:

The degree of lymphatic obstruction

Whether functional lymphatic pathways remain

Which treatment strategies may be appropriate

 

 

Q7. Is lymphoscintigraphy required before lymphaticovenular anastomosis (LVA)?

Not every patient requires surgery, but when LVA is considered,

accurate evaluation of remaining lymphatic function is essential.

Lymphoscintigraphy provides important information about whether functional lymphatic pathways are likely to remain and supports safe, individualized surgical planning when combined with ICG lymphography and ultrasound.

 

 

Q8. Do you perform lymphoscintigraphy during online consultations?

Lymphoscintigraphy itself is not performed online.

However, during an online consultation, we:

Review lymphoscintigraphy results performed in your home country

Explain the findings in clear, understandable terms

Discuss potential treatment options at our clinic

ICG lymphography and lymphatic ultrasound are performed in person at our clinic in Tokyo.

 

 

Q9. What if lymphoscintigraphy is not available in my country?

If lymphoscintigraphy is not available or difficult to arrange in your country,

we can help schedule the examination at Lymphedema Clinic Tokyo.

 

 

Our team will assist with coordination so that the test can be performed efficiently during your visit.

Q10. Does lymphoscintigraphy alone determine my treatment plan?

No.

Imaging results alone never determine treatment decisions.

We always consider:

Imaging findings

Clinical symptoms

Lifestyle and daily activities

Patient goals and preferences

Treatment planning is always personalized and individualized.

 

 

Q11. Is conservative treatment still important if surgery is an option?

Yes.

Conservative treatment—including compression therapy, skincare, and exercise—remains the foundation of lymphedema care, even when surgery is considered.

In many cases, the most effective strategy involves a combination of conservative management and microsurgical treatment, tailored to each patient.

 

 

【Our Message】

If you are living with lymphedema and would like a clearer understanding of your diagnosis and treatment options,

we would be pleased to assist you.

At Lymphedema Clinic Tokyo, we provide evidence-based diagnosis and personalized treatment planning using lymphoscintigraphy, ICG lymphography, and lymphatic ultrasound.

 

▶ Learn more about online consultations for international patients

▶ Contact Lymphedema Clinic Tokyo to discuss lymphoscintigraphy and treatment options

https://www.english-mominoki-shinryosho.net/for-inernational-patients/