Successful resection of stage IV non-small cell lung cancer with muscle metastasis as the initial manifestation: a case report.

Here, we report a rare case of a 39-year-old male who presented with left forearm pain and swelling as the initial manifestation of non-small cell lung cancer (NSCLC). The patient underwent chemoradiotherapy followed by surgical resection of the primary lesion as a salvage treatment. Four years and 7 months after his first presentation, the patient is alive with no symptoms of recurrence or metastasis. Although the optimal treatment for skeletal muscle metastasis from NSCLC has not been determined, aggressive treatment for the primary and the solitary metastatic lesion could be considered as a potentially successful treatment option.