Long-term survival in a patient with metastatic squamous cell lung carcinoma: A case report.

Non-small-cell lung cancer (NSCLC) is the most common malignancy in industrialized countries, with a 5-year survival rate of only ~15%, as the majority of the patients have advanced-stage disease at diagnosis and the treatment options are limited. Squamous cell carcinoma the second most frequent type of NSCLC and is closely associated with cigarette smoking. We herein present the case of a 72-year-old male smoker, diagnosed with stage IV squamous cell lung carcinoma, with a solitary brain metastasis. After the diagnosis, stereotactic radiotherapy was performed on the brain metastasis. Following radiotherapy, chemotherapy with carboplatin + paclitaxel was initiated. However, after 2 cycles of chemotherapy, disease progression in the lung was observed. Therefore, second-line treatment with pemetrexed was started, which was discontinued after 2 cycles due to further disease progression. Third-line treatment with erlotinib was then administered, with notable benefit, as the patient remains alive after 6 years of treatment with a good performance status. The mutation status of EGFR was unknown.