Histology based selection of chemotherapy is now standard of for stage IV metastatic NSCLC. A large randomized Phase III trial from Europe showed that a combination of Cisplatin and Pemetrexed is more effective in patients with non-squamous histology and a combination of Cisplatin and Gemcitabine showed efficacy in patients with squamous cell histology (7). Recently maintenance Pemetrexed was evaluated in advanced NSCLC and showed improvement in PFS and OS in patients with non-squamous histology (8). Similarly maintenance gemcitabine has also been evaluated in large Phase III clinical trial after initial chemotherapy with Cisplatin and Gemcitabine (9).