Computed tomography of the tongue and floor of the mouth.

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Abstract
The anatomy of the tongue and floor of the mouth is readily discernible by computed tomography (CT), because of low-density fascial planes that outline the extrinsic musculature, lingual arteries and hypoglossal nerves. Although the tongue is accessible to the examining finger, few patients can tolerate a detailed palpation. In planning for a partial glossectomy, CT scanning aids the surgeon who must be sure that the tumor is unilateral or that at least 1 lingual artery and 1 hypoglossal nerve can be preserved. The CT scans of 30 patients were reviewed for background anatomy. Pathologic changes are summarized for 16 extrinsic lesions and 11 intrinsic tumors. The status of the midline could be confirmed in 28 of the 30 patients. The fascial plane distortions, by malignant intrinsic and extrinsic lesions, are discussed.

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