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Colour Doppler flow in normal axillary lymph nodes

W T Yang1, C Metreweli

  • 1Department of Diagnostic Radiology & Organ Imaging, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong.

The British Journal of Radiology
|July 11, 1998
PubMed
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Color Doppler ultrasound detects flow in both normal and cancerous axillary lymph nodes. Its use alone is unreliable for diagnosing breast cancer metastasis, with grayscale ultrasound proving more accurate.

Area of Science:

  • Oncology
  • Radiology
  • Medical Imaging

Background:

  • Accurate staging of breast cancer requires evaluation of axillary lymph node status.
  • Conventional ultrasound (grayscale) has limitations in definitively diagnosing lymph node metastasis.
  • Color Doppler ultrasound is a modality used to assess blood flow within tissues.

Purpose of the Study:

  • To evaluate the diagnostic performance of color Doppler ultrasound in identifying metastatic axillary lymph nodes in breast cancer patients.
  • To compare the accuracy of color Doppler ultrasound with grayscale ultrasound criteria for lymph node metastasis detection.

Main Methods:

  • Pre-operative color Doppler ultrasound was performed on 81 women with breast carcinoma undergoing axillary nodal dissection.
  • Grayscale ultrasound criteria (loss of fatty hilum, cortical hypertrophy) were also assessed.

Related Experiment Videos

  • A second cohort of 106 women undergoing screening had their axillary nodes assessed with color Doppler.

    • Main Results:

    • Color Doppler flow was detected in 83.6% of normal and 87.5% of metastatic lymph nodes.
    • Using color Doppler alone yielded low specificity (9.52%) and accuracy (50%) for metastasis.
    • Grayscale criteria achieved higher sensitivity (79.5%), specificity (94.0%), and accuracy (87.6%).

    Conclusions:

    • Color Doppler signals are present in both normal and metastatic axillary lymph nodes.
    • Color Doppler ultrasound is not specific enough to be used as the sole criterion for diagnosing malignancy in lymph nodes.
    • Grayscale ultrasound criteria are more reliable for the diagnosis of axillary lymph node metastasis in breast cancer.