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Related Experiment Videos

Sentinel lymph node localization in early breast cancer

S A Gulec1, F L Moffat, R G Carroll

  • 1Division of Nuclear Medicine, Sylvester Comprehensive Cancer Center, University of Miami School of Medicine, Florida 33136, USA.

Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine
|August 26, 1998
PubMed
Summary

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Sentinel lymph node (SLN) biopsy using 99mTc-sulfur colloid is a valid technique for node-negative breast cancer staging. This method achieved high identification rates with no false negatives, demonstrating its clinical utility.

Area of Science:

  • Oncology
  • Surgical Pathology
  • Nuclear Medicine

Background:

  • Accurate staging of breast cancer is crucial for treatment planning.
  • Sentinel lymph node (SLN) biopsy is a key procedure for assessing axillary lymph node involvement.
  • Minimally invasive techniques are preferred to reduce morbidity.

Purpose of the Study:

  • To evaluate the clinical validity and feasibility of sentinel lymph node biopsy in node-negative breast cancer.
  • To assess the effectiveness of unfiltered 99mTc-sulfur colloid and gamma probe for SLN localization.
  • To determine the learning curve associated with this SLN localization technique.

Main Methods:

  • A multicenter trial involving 32 patients with clinical node-negative breast cancer.
  • Injection of unfiltered 99mTc-sulfur colloid around the tumor or excision cavity.

Related Experiment Videos

  • SLN biopsy performed 1.5-6 hours post-injection with intraoperative gamma probe localization.
  • Complete axillary dissection performed on all patients.

    • Main Results:

    • Sentinel lymph node was successfully identified in 30 out of 32 patients (94% identification rate).
    • No false-negative SLN biopsies were recorded, indicating high diagnostic accuracy.
    • Effective SLN localization was achieved with unfiltered 99mTc-sulfur colloid and a gamma detection probe.

    Conclusions:

    • Sentinel lymph node biopsy using unfiltered 99mTc-sulfur colloid is clinically valid for breast cancer staging.
    • The learning curve for this technique is short, with high localization rates achievable by experienced surgeons.
    • The use of unfiltered 99mTc-sulfur colloid with a larger injected volume facilitates effective SLN localization.