CT diagnosis of the non-epithelial benign tumors of the larynx

Objective: To investigate CT findings of the non-epithelial benign tumors of the larynx and their value in diagnosis and treatment. Methods: Thirty-nine patients with non-epithelial benign tumors of larynx were examined with CT before treatment. Results: Twenty-two cases with hemangioma displayed phebolithes in 9 cases, plain CT in 8 cases showed isodensity with respect to muscle near them and enhanced CT in 14 cases showed moderate to marked enhancement(9 cases) and no contrast enhancement(5 cases). Among 6 cases of neurogenic tumor, neurilemmoma (5 cases) presented as low to intermediate density on plain CT scan( 1 case) and enhancement with homogeneous or inhomogeneous after enhanced CT, another case of neurofibroma presented as low density with homogeneous on plain CT imaging. Chondroma (3 cases) showed enhancement with inhomogeneous on enhanced CT scan. Pleomophic adenoma (3 eases) showed moderate to marked enhancement and one of the three cases presented as marked cystic degeneration. Lipoma (2 cases)demonstrated low density with no contrast enhancement. Lymphangioma, leiomyoma and fibroma (each has 1 case) displayed no contrast enhancement (lymphangioma) and moderate to marked enhancement (leiomyoma and fibroma) on enhanced CT scans. Conclusion: CT can definitely display the shape, range and density of the tumors in larynx and provide information for diagnosis and treatment. (authors)