Spindle cell carcinoma of the larynx.

Histology, histogenesis, biology and treatment of the rare spindle cell carcinoma of the larynx are presented. The histogenesis of spindle cell tumours has been much debated, but electron microscopic investigations have shown that most of the laryngeal lesions are squamous epithelial carcinomas that have undergone transformation to a spindle cell pattern. As confusion with supporting tissue neoplasms may occur in the light microscope, the use of the electron microscope in differential diagnostics is recommended.