Abstract

Breast pseudoaneurysm is a rare complication following breast interventional procedures such as core biopsies and vacuum-assisted biopsies. The occurrence of pseudoaneurysm increases with the conditions of increased breast vascularity like cancer, pregnancy and lactation. We present two cases of pseudoaneurysm formation secondary to core biopsies of the breasts. The first patient was an 82-year-old female patient who presented with breast swelling and bruising after multiple clinical core biopsies of the left breast. Our second patient was a 47-year-old lady who presented with a palpable lump following ultrasound-guided core biopsies of the left breast. Ultrasound showed hypoechoic pulsating area with evidence of internal colour flow in connection with a vessel in both cases. Imaging appearances were in keeping with a pseudoaneurysm of the breast. Most pseudoaneurysms are secondary to interventional procedures in the breast. Common clinical presentation is a pulsatile, palpable mass at the biopsy site soon after the biopsy or later. On B mode imaging, it presents as a well-circumscribed mass of mixed echogenicity. Typical waveform in spectral Doppler and 'yin-yang' sign in colour Doppler is demonstrated with a turbulent internal flow. There are different treatment options to manage pseudoaneurysms of the breast. Pseudoaneurysm of the breast should be considered if a patient presents with a breast mass/lump close to a recent biopsy site. On clinical examination, pulsatility of the mass should raise the suspicion and definite diagnosis can be made with spectral and colour Doppler US scan.

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