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Lymphoscintigraphy / sentinel node scan

A Lymphoscintigraphy / sentinel node scan is a nuclear medicine test of the lymph nodes. It shows lymph drainage and the first node a cancer may spread to. Typical effective dose 0.2 to 1 mSv, similar to about 1 to 4 months of natural background radiation (about 3 mSv a year).

सामान्य स्वास्थ्य जानकारी — यो निदान होइन। आपत्कालमा १०२ मा फोन गर्नुहोस्। सधैं योग्य स्वास्थ्यकर्मीसँग सल्लाह लिनुहोस्।

What it shows

Lymph drainage and the first node a cancer may spread to.

Why it is done

Breast cancer or melanoma surgery planning, lymphoedema.

Preparation

A small radioactive tracer is injected or swallowed. Preparation depends on the test; tell staff if pregnant or breastfeeding, as feeding may need a pause.

Radiation & safety

Typical effective dose 0.2 to 1 mSv, similar to about 1 to 4 months of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; the benefit usually outweighs the small risk, and shielding or alternatives can be considered.

How long it takes

1 to 3 hours. General information, not a diagnosis. Results must be interpreted by a qualified health worker.

Sample type

Nuclear medicine

नतिजा व्याख्या गर्न डाक्टरलाई देखाउनुहोस् — एउटै परीक्षणले निदान गर्दैन।

यो कहाँ गर्न सकिन्छ

तपाईंनजिकको हेरचाह

नजिकका सुविधा देखाउन तपाईंको स्थान एक पटक प्रयोग गर्छ। केही सुरक्षित गरिँदैन।

सामान्य प्रश्न

What does a sentinel node scan show?
Lymph drainage and the first node a cancer may spread to.

Why is a sentinel node scan done?
Breast cancer or melanoma surgery planning, lymphoedema.

How do I prepare for a sentinel node scan?
A small radioactive tracer is injected or swallowed. Preparation depends on the test; tell staff if pregnant or breastfeeding, as feeding may need a pause.

Does a sentinel node scan use radiation?
Typical effective dose 0.2 to 1 mSv, similar to about 1 to 4 months of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; the benefit usually outweighs the small risk, and shielding or alternatives can be considered.

How long does a sentinel node scan take?
1 to 3 hours

Lymphoscintigraphy / sentinel node scan किन गरिन्छ?
Breast cancer or melanoma surgery planning, lymphoedema.

Lymphoscintigraphy / sentinel node scan का लागि कसरी तयारी गर्ने?
A small radioactive tracer is injected or swallowed. Preparation depends on the test; tell staff if pregnant or breastfeeding, as feeding may need a pause.

Lymphoscintigraphy / sentinel node scan गर्भावस्थामा सुरक्षित छ?
Typical effective dose 0.2 to 1 mSv, similar to about 1 to 4 months of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; the benefit usually outweighs the small risk, and shielding or alternatives can be considered.

SI text CC BY 4.0; RadiologyInfo.org (ACR/RSNA) and MedlinePlus linked as references only, no text copied.

स्रोत: SI health summary (own words); decoder imaging pack; RadiologyInfo.org and MedlinePlus as references only

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