Hitherto, most of the drugs in question are given in the palliative setting, i.e. to patients with disseminated metastatic disease. The metastatic lesion may be very different from the primary tumor, and hence, it is rational to analyze the tumor to be treated, the metastatic lesion(s), for the presence of molecular aberrations, rather than basing treatment decisions on molecular features known to be present in a particular tumor type or in the primary tumor.