Abstract PO3-20-12: A Case Report on the Management of a Patient with Local Breast Cancer, BIA-ALCL and Radiation Induced Metastatic Angiosarcoma: A Multidisciplinary Approach

Abstract A Case Report on the Management of a Patient with Local Breast Cancer, BIA-ALCL and Radiation-Induced Metastatic Angiosarcoma: A Multidisciplinary Approach Abstract: Breast cancer recurrence presents a complex challenge in clinical practice. We present the case of a 60-year-old female with a history of stage 2A right breast cancer diagnosed on 12/1/2013. The patient underwent bilateral mastectomy and adjuvant chemotherapy, followed by breast reconstruction. The patient subsequently developed asymmetric right breast swelling, which was biopsied and was positive for T lymphocyte markers CD30, CD43, CD45, CD4 and she was diagnosed with anaplastic large cell lymphoma in 12/14/2018, which was thought to be associated with her breast implants. In May 2022, a right chest wall mass was detected, which demonstrated growth and increased vascularity on imaging. A biopsy on 5/5/22 confirmed poorly differentiated carcinoma initially thought to be a secondary intraductal carcinoma of the breast, invading the chest wall by metastasis or direct extension, negative for estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2). Further workup confirmed this mass to be angiosarcoma, most likely associated with the patient’s prior radiation therapy. The patient was started on neoadjuvant carboplatin/paclitaxel/pembrolizumab on 6/9/2022, and continued with Doxorubicin/Cyclophosphamide and pembrolizumab, which was completed on 11 November 2022. Imaging studies post-treatment showed a slightly smaller mass in the right mastectomy bed, indicating a partial response to treatment. However, a subsequent PET scan revealed a recurrence of breast cancer in the right chest wall. Considering the patient's history of prior radiation therapy and the inability to administer further radiation, the treatment plan was revised. She underwent reconstructive chest wall surgery on 1/4/2023, with complete resection and negative margins. She started on adjuvant pembrolizumab planned for one year, but the patient presented on 3/3/2023 with the growth of a chest wall mass and bleeding, consistent with progression. Liquid Tempus testing was obtained but negative for an actionable target. Options such as hyperthermia, enrollment to clinical trial, and re-irradiation were discussed, and the patient was restarted on weekly paclitaxel on 3/31/2023 due to a previous response. The patient had further local disease progression on 5/26/2023, and this regimen was stopped. The patient is planning to get Tempus testing on tumor tissue and start the next line palliative regimen with either doxorubicin or gentamicin and repeat re-irradiation if no response to these regimens. This case report highlights the challenges in managing breast cancer therapy-induced adverse conditions with two secondary tumors, both associated with the patient’s prior therapy. The importance of a multidisciplinary approach, including medical oncology, surgical oncology, radiation oncology, and sarcoma specialists, is emphasized. The use of molecular testing and consideration of clinical trials may provide additional treatment options. Further research and clinical trials are warranted to optimize the management of recurrent breast cancer with transformation to rare histological subtypes such as angiosarcoma. Citation Format: Liubou Varanitskaya, Serhan Unlu, Christina Clemow. A Case Report on the Management of a Patient with Local Breast Cancer, BIA-ALCL and Radiation Induced Metastatic Angiosarcoma: A Multidisciplinary Approach abstract. In: Proceedings of the 2023 San Antonio Breast Cancer Symposium; 2023 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2024;84(9 Suppl):Abstract nr PO3-20-12.