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Acta Otolaryngol. 1997 Mar;117(2):312-5.

Syndecan-1: a new prognostic marker in laryngeal cancer.

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Departments of Otorhinolaryngology, Turku University Central Hospital, Finland.


The cell adhesion molecule syndecan-1 expression is induced during keratinocyte differentiation and reduced during the formation of squamous cell carcinomas (SCCs). A significant correlation between decreased syndecan-1 expression in head and neck SCC measured from frozen sections with immuohistochemical methods and clinical outcome are reported. The clinical relevance of the cellular proliferation marker Ki-67 is controversial in SCC of the head and neck. The purpose of this study was to determine the expression of syndecan-1 and Ki-67 in SCC of the larynx and correlate the results with known prognostic factors and clinical outcome. Paraffin-embedded samples of 100 patients with laryngeal SCC (44 glottic, 36 supraglottic, 20 transglottic) treated at Turku University Central Hospital were re-examined and divided into four histological grades of differentiation, four grades of keratinisation, and four grades of 104-9 (syndecan-1) immunostaining. The mitotic index was analysed as the number of mitoses per volume corrected high power fields. The relative number of Ki-67 positive cells was evaluated. The patients mean age was 64 years and the 5-year survival was 69%. In univariate analysis, intermediate or strong staining for syndecan-1 was associated with higher overall survival than those tumours with no or little syndecan-1 expression (p = 0.048). Nodal status (p = 0.0001), tumour size (p = 0.0004) and localisation (p = 0.0008), general condition (p = 0.0001), histological grade (p = 0.02) and patient age (p = 0.03) correlated with overall survival whereas the Ki-67 index (p = 0.093), mitotic index (p = 0.23) and grade of keratinisation (p = 0.90) failed to do so. The results suggest that syndecan-1 could be a useful prognostic factor in SCC of the larynx.

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