He underwent right nephrectomy with a pathological diagnosis of renal cell carcinoma of unclassified histology. The tumor was tested for Her2/neu, which was strongly positive, +3 by IHC. Then, the patient was started on weekly trastuzumab (4 mg/kg loading dose, then 2 mg/kg maintenance) and paclitaxel 80 mg/m2. Three months later, repeated scanning showed continuous response to therapy.