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Related Experiment Videos

Sentinel lymph node mapping in melanoma with technetium-99m dextran.

S Neubauer, I Mena, R Iglesis

    Cancer Biotherapy & Radiopharmaceuticals
    |July 27, 2001
    PubMed
    Summary
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    Technetium-99m dextran effectively visualizes sentinel lymph nodes in skin cancer patients, aiding in accurate biopsy. This agent offers a safe alternative to biological materials for lymphoscintigraphy.

    Area of Science:

    • Nuclear Medicine
    • Oncology
    • Surgical Pathology

    Background:

    • Sentinel lymph node biopsy is crucial for staging skin cancers like melanoma.
    • Accurate identification of sentinel nodes is essential for effective treatment planning.
    • Current lymphoscintigraphic agents may pose risks due to their biological origin.

    Purpose of the Study:

    • To assess the efficacy of Technetium-99m dextran (Tc99m-Dextran) as a lymphoscintigraphic agent.
    • To evaluate its capability in detecting sentinel nodes in patients with skin lesions.
    • To compare its safety profile with existing agents.

    Main Methods:

    • Tc99m-Dextran was intradermally injected in 41 patients with melanomas or Merkel cell tumors.
    • Serial gamma camera imaging and a handheld gamma probe were utilized.

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  • The agent's ability to visualize lymph channels and sentinel nodes was assessed pre-surgery.

    • Main Results:

    • Tc99m-Dextran successfully visualized lymph channels and sentinel nodes in 39 out of 41 patients.
    • An average of 1-3 sentinel nodes were identified per patient.
    • No adverse reactions were reported during the study.

    Conclusions:

    • Tc99m-Dextran demonstrates high capability in defining lymph channels and localizing sentinel nodes.
    • It provides a safe alternative to lymphoscintigraphic agents derived from biological sources.
    • This agent enhances the accuracy and safety of sentinel node biopsy for skin cancer staging.