Epidermal growth factor receptor mutations occur at a higher frequency in tumors from East Asians than from non-Asians (30 versus 8%), from women than from men (59 versus 26%), from never smokers than from ever smokers (66 versus 22%), and in ADC’s compared with other NSCLC histologies (49 versus 2%) (29). The gene discussed is EGFR; the disease is AIDS dementia complex.