Soft Tissue Metastasis of Breast Cancer

Abstract

Cancers that are metastasizing to soft tissue are rare. Here we present a case of metastatic breast cancer to the soft tissue of the back.Case Report: A 64 years female patient with a history of previously completed treatment for bilateral breast cancer 3 years ago, presented with hard fixed soft tissue mass in lower part of her back on right side. CT scan of abdomen revealed a mass in right External Oblique muscle of the right lumber region. A biopsy was taken from it showed metastatic carcinoma. Thorough systemic search for the primary tumor was done. Post operative histopathology revealed metastatic mammary duct carcinoma, grade 3. Discussion: Plaza JA et al.[1] had a series of 118 patients having metastasis to the soft tissue and out of those only 13 cases corresponds to metastasis from breast cancer and 3 of those were having metastasis to the back. However, we have not found any other report of soft tissue mass over back as a metastasis from breast cancer. We strongly suggest histological verification and systemic evaluation, whenever soft tissue masses are located elsewhere even after a curative breast cancer operation. Conclusion:Soft tissue metastasis from breast cancer is uncommon but can present. Proper diagnosis is needed to improve the treatment outcome.