Axillary fat metastasis in breast cancer: A case report

Metastasis remains the primary cause of mortality for patients with breast cancer. Breast cancer metastasis primarily occurs through direct infiltration, the lymphatic system and hematogenous spread, with the axillary lymph nodes being the most common metastatic sites, followed by the lungs, bones, liver and brain. However, metastasis to adipose tissue in malignant tumors is exceedingly rare. The present case report comprehensively describes the clinical diagnosis and treatment of a 54-year-old woman with a malignant tumor in the left breast that metastasized to the left axillary fat tissue. Furthermore, a discussion of relevant studies on fat metastasis in malignant tumors is presented.