Fig. 2. Reactive versus malignant lymphadenopathy.

A. Ultrasound of right axilla in 33-year-old female with large right breast abscess reveals enlarged lymph node with smooth thickening of cortex. Normal fatty hilum and reniform configuration is preserved. These are features of benign reactive lymph node. B. Ultrasound of right axilla in 52-year-old female, with painful right breast mass and palpable right axillary nodes. Lymph nodes reveal bulky cortex (white arrows) and loss of normal fatty hilum (black arrow), features that are more worrisome for malignant involvement. Ultrasound-guided biopsy of node was conducted and diagnosis of lymphoma was made.