Virchow's Node
A superficial supraclavicular lymph node that indicates metastatic cancer is called a Virchow's node (or Virchow-Troisier node), and when located on the left side specifically, it is termed Troisier's sign.
Clinical Significance and Staging Implications
The presence of a palpable supraclavicular lymph node with metastatic cancer carries important prognostic and staging implications that vary by primary tumor location:
For Lung Cancer
Supraclavicular lymph node involvement is classified as N3 disease 1. According to ACR guidelines, N3 includes "contralateral mediastinal or hilar lymph node(s) and any supraclavicular or scalene node on either side" 1. This represents advanced regional disease and constitutes stage IV disease when combined with the primary tumor characteristics.
For Breast Cancer
Ipsilateral supraclavicular lymph node metastases are classified as N3c disease 2, 3. The ESMO guidelines specifically state that "N3c" indicates "Metastases in ipsilateral supraclavicular lymph node(s)" 2. This represents the most advanced nodal stage for breast cancer and significantly impacts treatment planning.
For Head and Neck Cancers
Supraclavicular involvement typically indicates distant metastasis rather than regional disease 4, 5. The clinical practice guidelines note that "50% of masses in level IV and the supraclavicular fossa arise from primary malignancies below the clavicle, including the chest and gastrointestinal tract" 4.
Diagnostic Utility
Supraclavicular lymph nodes are easily accessible for tissue diagnosis and molecular profiling 6. Recent evidence demonstrates that ultrasound-guided biopsy of these nodes provides adequate tissue for:
- Histologic diagnosis (78.4% malignancy rate in one series) 6
- Immunohistochemistry (71.6% of cases) 6
- PD-L1 testing (23.9% of cases) 6
- Next-generation sequencing studies (9.1% of cases) 6
Clinical Pearls
The prevalence of supraclavicular metastases varies significantly by cancer type:
Left-sided supraclavicular nodes (classic Virchow's node) are more commonly involved (61.4% vs 38.6% right-sided) 6, reflecting lymphatic drainage patterns from abdominal and thoracic malignancies.
Ultrasound characteristics of metastatic supraclavicular nodes include:
- Loss of echogenic fatty hilum (100% of metastatic nodes) 8
- Round shape (84.61%) 8
- Peripheral disorganized vascularity pattern (92.30%) 8
- Only 69.23% are palpable on physical examination 8
This underscores the value of ultrasound evaluation even when nodes are not clinically apparent, as imaging can detect metastatic involvement before nodes become palpable and guide safe tissue sampling 8.