Figure 3From: Complete response in gallbladder cancer to erlotinib plus gemcitabine does not require mutation of the epidermal growth factor receptor gene: a case report EGFR mutation analysis. Polymerase chain reaction amplification plot of exons 18-21 demonstrating the presence of only wild-type EGFR DNA in the patient's tumor sample. (Performed by Clarient Diagnostic Services, Aliso Viejo, CA)Back to article page