Breast pseudoaneurysm following tomosynthesis-guided vacuum-assisted biopsy successfully treated with ultrasound-guided thrombin injection: A case report of a rare breast emergency.

Digital tomosynthesis-guided vacuum-assisted breast biopsy is a standard minimally invasive technique for diagnosing focal breast lesions, with vascular complications such as pseudoaneurysm formation being exceedingly rare. We report the case of a 64-year-old postmenopausal woman who developed a 2.6-cm intramammary pseudoaneurysm in the right breast following digital tomosynthesis-guided vacuum-assisted breast biopsy for high-grade ductal carcinoma in situ adjacent to an invasive carcinoma with choriocarcinomatous differentiation, successfully treated with ultrasound-guided percutaneous thrombin injection, without complications. This case emphasizes the importance of early recognition of post-biopsy pseudoaneurysms to avoid potential hemorrhagic complications. Furthermore, this case demonstrates that ultrasound-guided breast thrombin injection is a safe and effective minimally invasive treatment option and highlights the importance of individualized therapeutic approaches to optimize outcomes.