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Psammomatous Colloid Carcinoma of the Breast with Micropapillary Pattern

1 week, the patient presented with reduced hematoma dimensions on US, without evidence of internal flow on Doppler. Pseudoaneurysm is an uncommon complication due to a transmural rupture of an arterial wall and the subsequent formation of a hematoma that maintains in communication with the arterial lumen. Cases are reported in the literature of breast pseudoaneurysms secondary to trauma, vascular catheterization, postoperative and after percutaneous procedures such as biopsy by large-core needle (core biopsy) and vacuum-assisted biopsy. It is more frequent in older patients, patients with atherosclerotic disease and in those in use of anticoagulant therapy. The ultrasonographic appearance consists of heterogeneous collection with typical vascularization on Doppler. Patients are often asymptomatic and simple US monitoring may be sufficient on the basis of its morphological characteristics. Spontaneous thrombosis depends on the size of pseudoaneurysm, length of the communication with the arterial vessel and anticoagulative state of the patient. In the absence of spontaneous thrombosis, therapeutic options for pseudoaneurysm include US-guided compression, percutaneous injection of thrombin or alcohol, embolization, and surgical repair. The recognition of clinical signs during the procedure and use of Doppler can offer an early diagnosis and greater chance of successful nonsurgical occlusion.