Abstract
Carcinoma of a muscle is always secondary either to a direct propagation from a neighboring tissue or to a metastasis. When carcinoma affects such an organ as the larynx, the clinical picture may suggest a neurogenic condition. Invasion of the muscle tissue by cancer cells results in a variety of changes in the muscle fibers; namely, swelling, fragmentation, loss of striations, liquefaction, fibrillary disruption, degeneration and necrosis. Changes in the muscles and not in the nerves may be the real cause of a laryngeal paralysis.

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