Contralateral axillary sentinel lymph node in breast cancer recurrence

Area of Science:

• Oncology
• Surgical Oncology
• Nuclear Medicine

Background:

• Aberrant lymph node drainage is a rare but significant finding in breast cancer patients.
• Current staging classifies these cases as stage IV, potentially affecting treatment decisions.

Observation:

• A patient with recurrent right breast invasive ductal carcinoma presented with unusual lymphatic drainage.
• Preoperative lymphoscintigraphy identified sentinel lymph node drainage to the contralateral axilla.

Findings:

• The discovery of contralateral axilla drainage altered the patient's surgical approach.
• This finding led to a revised clinical stage for the patient.

Implications:

• This case highlights the need to re-evaluate current breast cancer staging and treatment protocols for aberrant lymphatic drainage.
• Accurate lymph node mapping is crucial for precise staging and personalized treatment planning in breast cancer.