Fig. 4

A 45-year-old female with metastatic gallbladder carcinoma. Axial contrast-enhanced CT images demonstrate a a 1.5-cm liver metastasis (arrowheads) and b prominent soft tissue (arrows) in the cholecystectomy bed abutting the liver. After 2 months of treatment with trastuzumab, c the liver metastasis is barely visible at 4 mm, and d the soft tissue mass in the resection bed, representing recurrent tumor, is decreased. She was stable for an additional 5 months, then had recurrence in the resection bed