Squamous cell carcinoma of the lung: An unusual metastasis to pectoralis muscle

A 44-year-old man with clinical T2 N0 M0 squamous cell carcinoma of the lung presented 4 weeks after left pneumonectomy with a single metastasis to his right pectoralis major muscle. Three years after excision and chemotherapy he remains in remission. Muscle metastasis of carcinoma is an infrequent occurrence. Further investigation into the incidence and treatment is warranted.