A Case Report and Literature Review of Skeletal Muscle Metastasis of Non-small Cell Lung Cancer.

Non-small cell lung cancer metastasis to skeletal muscle is an uncommon occurrence. Lung cancers are more likely to spread to the brain, bone, liver, and adrenals. Here, we present a rare case of non-small cell lung cancer metastasis to the skeletal muscle in a 54-year-old male. In addition, we present a literature review on skeletal metastasis of non-small cell lung cancer. The most frequent presentation of skeletal muscle metastasis is muscular pain with or without swelling. The mechanism of metastasis to muscle is not well understood; it is theorized that hematogenous spread is the most likely route. As with our patient, the presence of skeletal muscle mass is considered an aggressive disease with poor survival, usually less than one year. The treatment for muscle metastasis is often palliative in the form of radiation therapy, chemotherapy, or surgical removal of the mass.