Fig. 5
A 73-year-old female with metastatic retroperitoneal lymphadenopathy from gallbladder carcinoma. Axial contrast-enhanced CT images demonstrate a a 1.9-cm lymph node (arrowheads) posterior to the left renal vein. After 2 months of trastuzumab and pertuzumab, b the lymph node decreased to 1.2 cm. c Her CA 19-9 response to HER2/neu inhibition after prior FGFR inhibitor therapy