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Click 43 year old female with malignant phyllodes tumor. Contrast enhanced CT of the chest (410 mAs, 120 kVP, 1.5 and 5.0 millimeter (mm) slices). Axial and sagittal reformatted images demonstrate a large heterogeneous breast mass which abuts the left pectoralis major muscle. There is no fat plane between the mass and the muscle. There is a normal appearing right axillary lymph node. No abnormal lymph nodes were identified.

Click 43 year old female with malignant phyllodes tumor. Non-enhanced axial CT of the chest demonstrates a large parasternal soft tissue mass. Periosteal reaction around the sternum is present. There are post-surgical changes consistent with left mastectomy. (76 mAs, 120 kVP, 5.00 mm slices.)

Click 43 year old female with malignant phyllodes tumor. Non-enhanced chest CT (305 mAs, 120 kVP, 1.5 mm slices). Large soft tissue masses are present in the left chest and right axilla. There is extensive bilateral pleural disease. Lung windows demonstrate significant pulmonary parenchymal involvement. Even with abdominal window settings, in the right lung, parenchymal disease can be visualized.

Click 43 year old female with malignant phyllodes tumor. Non-enhanced non-fat suppressed coronal T1 weighted image (T1W) (TE 11 / TR 641): Abnormal low signal intensity is present beginning at the intertrochanteric region and extending through the medullary cavity of the femur.

Click 43 year old female with malignant phyllodes tumor. Contrast enhanced fat suppressed (17 ml gadobenate dimeglumine) coronal T1W image (TE 8.9 / TR 673): There is an enhancing soft tissue mass superficial to the femoral cortex and abnormal enhancement along the periphery of the area of low signal intensity seen in image stack 1. There is also enhancement in the surrounding soft tissues.

Click 43 year old female with malignant phyllodes tumor. Non-enhanced coronal short tau inversion recovery image (TE 41 / TR 3000): Increased signal intensity throughout the area of abnormal signal seen on image stack 1 and extending into the surrounding soft tissue.