 EML4-ALK fusion genes have been recognized as novel "driver mutations" in a small subset of non-small cell lung cancers (NSCLC).     ///    "EML4-ALK fusion genes were identified by RT-PCR, whereas EGFR (Exons 18-21) and KRAS (Exons 1 and 2) mutations were detected by DNA sequencing. "    ///    Detection of EML4-ALK fusion genes in non-small cell lung cancer patients with clinical features associated with EGFR mutations..     ///    Our data support the conclusion that the EML4-ALK fusion gene defines a new molecular subset of NSCLC with distinct pathologic features..     ///    "Of the eight patients with EML4-ALK, none had an EGFR mutation, whereas a KRAS mutation was detected in one patient. "    ///    "Histologically, five of the EML4-ALK positive tumors were adenocarcinoma and two were mixed adenosquamous carcinoma. "    ///    "Thirty-one (31%) cases were wild type for EML4-ALK, EGFR, and KRAS mutations. "    ///    "Of the eight patients with EML4-ALK, none had an EGFR mutation, whereas a KRAS mutation was detected in one patient."    ///    The frequency of EML4-ALK fusions in NSCLC patients who have clinical characteristics related to EGFR mutation remains unknown.     ///    "Eight specimens (8%) were positive for EML4-ALK fusions, with seven being Variant 1 and one Variant 2. "    ///    "Eight specimens (8%) were positive for EML4-ALK fusions, with seven being Variant 1 and one Variant 2."