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An Official Publication of the Indian Association of Oral and Maxillofacial Pathologists

ORIGINAL ARTICLE Table of Contents   
Year : 2013  |  Volume : 17  |  Issue : 3  |  Page : 329-333
Association between langerhans cells population and histological grade of oral squamous cell carcinoma

1 Department of Physiology and Oral Pathology, University of Ibadan/University College Hospital, Ibadan, Nigeria
2 Department of Pathology, University of Ibadan/University College Hospital, Ibadan, Nigeria
3 Department of Otorhinolarynlogy, University of Ibadan/University College Hospital, Ibadan, Nigeria

Correspondence Address:
Taye J Lasisi
Departments of Physiology and Oral Pathology, University of Ibadan/University College Hospital, Ibadan
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0973-029X.125177

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Context: Langerhans cells (LCs) are a unique population of antigen processing cells in the epidermis and mucous membrane, which may play a role in the defence mechanism against epithelial tumors. Aims: To compare the distribution of LCs in oral squamous cell carcinomas (OSCC) and normal oral epithelium; and to determine whether the population of LCs in OSCC has any correlation with histological grading of these malignancies. Settings and Design: A cross-sectional immunohistochemical analysis of OSCC cases. Materials and Methods: Forty-eight randomly selected paraffin tissue blocks of OSCC cases and 30 cases of normal oral epithelium were included. Hematoxylin and eosin-stained sections of the OSCC cases were reviewed and categorized as high-grade malignant tumors or low-grade malignant tumors. Tissue sections were analyzed for density of LCs using CD1a antibody expression. Statistical Analysis Used: Data are expressed as percentages compared by Chi-square statistics; mean ± standard deviation, compared by Mann-Whitney-U test and Spearman's correlation tests. Results: LCs population was significantly higher in normal oral epithelium when compared with OSCC cases (P = 0.001). There was also a significant difference in the number of LCs per millimetre square area of tissue section between well-differentiated tumors and poorly-differentiated tumours (P = 0.03). There was a negative correlation between the population density of LCs and the grade of OSCC. Conclusions: These findings suggest that oral mucosal LCs are involved in immune-surveillance and immunologic impairment may characterize invasive OSCC. In addition, LCs density characterizes histological grades of OSCC, which may be of a prognostic value.

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Journal of Oral and Maxillofacial Pathology | Published by Wolters Kluwer - Medknow
Online since 15th Aug, 2007