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Related Experiment Videos

Baseline staging in cutaneous malignant melanoma.

J Hafner1, M Hess Schmid, W Kempf

  • 1Department of Dermatology, Institute of Social and Preventive Medicine, University Hospital of Zurich, CH-8091 Zurich, Switzerland. juerg.hafner@usz.ch

The British Journal of Dermatology
|April 22, 2004
PubMed
Summary

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Baseline staging for malignant melanoma (MM) is routine but its accuracy is unclear. Sentinel lymph node biopsy is crucial, detecting microscopic disease in most patients, while imaging has limited value for distant metastases.

Area of Science:

  • Oncology
  • Dermatology
  • Diagnostic Imaging

Background:

  • Routine baseline staging for primary cutaneous malignant melanoma (MM) lacks clear diagnostic accuracy data.
  • The impact of baseline staging on clinical outcomes in MM patients requires further investigation.

Purpose of the Study:

  • To evaluate the sensitivity and specificity of baseline staging methods for detecting regional lymph node and distant metastases in MM patients.
  • To assess the diagnostic performance of physical examination, ultrasound (US), chest X-ray, and positron emission tomography (PET) in MM staging.

Main Methods:

  • One hundred consecutive MM patients with tumor thickness >1.0 mm underwent extensive staging.
  • Methods included physical examination, US of abdomen and lymph nodes, chest X-ray, whole-body PET, and sentinel lymph node biopsy (SLNB).

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  • Sensitivity and specificity for detecting metastases were calculated for each modality.

    • Main Results:

    • SLNB was positive in 26% of patients, with 90% being microscopic.
    • US and PET showed low sensitivity (8%) for detecting positive SLNBs but high specificity.
    • Physical examination, US, and PET identified macroscopic lymph node metastases (>4 mm).
    • Distant metastases were rarely detected, with a 91% specificity for combined staging procedures.
    • Disease recurrence was higher in patients with positive SLNB (19%) compared to negative (5%).

    Conclusions:

    • Physical examination combined with lymph node US effectively detects macroscopic lymph node metastases.
    • SLNB identifies a significant number of patients with microscopic disease, often missed by imaging.
    • Whole-body staging at baseline has limited value for detecting distant metastases in MM.
    • Prospective trials are needed to establish the survival benefit of baseline staging and surveillance in cutaneous MM.