Moreover, RT-PCR using formalin-fixed, paraffin-embedded tissue from the right lung cancer also demonstrated EML4-ALK variant 1 fusion gene.    ///    Recurrence of lung adenocarcinoma after an interval of 15 years revealed by demonstration of the same type of EML4-ALK fusion gene..     ///    "Moreover, RT-PCR using formalin-fixed, paraffin-embedded tissue from the right lung cancer also demonstrated EML4-ALK variant 1 fusion gene. "    ///    "Although there is a possibility that the left lung cancer is de novo one with multiple metastases, detection of the same fusion gene of the very rare EML4-ALK variant 1 in both tumors suggests that the left cancer is a recurrence of the right lung cancer after an interval of 15 years. "    ///    "Using the BAL specimen from the left lower lung, EML4 (echinoderm microtubule-associated protein-like 4)-ALK variant 1 fusion gene was detected by reverse transcription-polymerase chain reaction (RT-PCR). "