Carcinoma of the Lung Occurring as a Skeletal Muscle Mass

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Abstract
Malignant neoplasms that metastasize to skeletal muscle are infrequent.1 Of such tumors, malignant lymphomas and leukemias predominate.2 This communication reports the unusual occurrence of a squamous cell carcinoma of the lung that first appeared as a triceps mass. Report of a Case.–A 61-year-old man was admitted to the Naval Regional Medical Center, Newport, RI, on Jan 21, 1976. Initially, he was seen in the orthopedic clinic with the complaint of a mass in his left upper arm of two months' duration. The mass caused no discomfort. The patient was a heavy cigarette smoker until two years prior to admission. On physical examination, a firm oval mass 8×5 cm, was present in the medial head of the left triceps, just above the elbow joint. On preoperative chest roentgenograms, the right hilus was noted to have an indistinct border. Routine laboratory studies and ECG gave findings within normal limits.

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