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Brazilian Journal of Otorhinolaryngology
Print version ISSN 1808-8694
MARTINS, Regina Helena Garcia et al. Reinkes'edema: immunoexpression study of fibronectin, laminin and colagen IV in 60 cases by imunohistochemical techniques. Braz. j. otorhinolaryngol. (Impr.) [online]. 2009, vol.75, n.6, pp.821-825. ISSN 1808-8694. http://dx.doi.org/10.1590/S1808-86942009000600008.
Reinke's edema is chronic laryngeal disease in which the superficial layer of the lamina propria is expanded by thick mucus, giving it a gelatin aspect. The disease is directly related to smoking and more frequent in women, who end up having a lower tone of voice. Its histological characteristics cannot always distinguish it from other benign lesions of the larynx for which additional histological techniques are necessary. AIM: to study the immunoexpression of fibronectin, collagen IV and laminin in Reinke's edema by immunohistochemical technique. Prospective study. MATERIALS AND METHODS: histological blocks of 60 cases of surgical Reinke's edema were saved, submitted to new cross-sections and to immunohistochemical reactions for fibronectin, laminin and collagen IV by the Avidin-Biotin-Peroxidase method. Fragments of five normal vocal folds were used as control, removed during autopsy. All patients were chronic smokers and adults- 50 women and 10 men. RESULTS: the immunoexpression of fibronectin, collagen IV and laminin was more important in the endothelium of blood vessels (68.33%, 76.66%, 73.33%, respectively) and less relevant in the basement membrane (25.0%, 5.0% and 3.3%, respectively). CONCLUSIONS: the immunoexpression of fibronectin, laminin and of collagen IV in the basal membrane of Reinke's edema was not relevant, with a predominance of these antibodies in the endothelium of blood vessels.
Keywords : type iv collagen; laryngeal edema; fibronectins; immunohistochemistry; laminin.