Fig. 4. Puerperal mastitis with abscess in a 32-year-old lactating woman who reported having a palpable mass for 4 months.

A. Ultrasonography shows poorly defined amorphous areas of hypoechoic and heterogeneous echogenicity, suggesting mastitis. The abscess is an oval-shaped, complex heterogeneous mass with hyperechoic debris (arrow). B. Color Doppler ultrasonography shows perilesional vascularity. Purulent exudate was obtained with fine-needle aspiration.