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An extremely rare salivary gland tumor: intraductal carcinoma of the buccal mucosa

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Abstract

Intraductal carcinoma of the salivary gland is a rare, indolent neoplasm characterized by intraductal malignant cell proliferation but lacking invasiveness, in contrast to conventional salivary duct carcinoma, a clinically aggressive neoplasm with invasive characteristics. The tumor affects the major salivary glands much more frequently than the minor salivary glands. This report describes an extremely rare intraductal carcinoma arising from the buccal mucosa in a 61-year-old man who presented with a painless mass in the left buccal mucosa, which he had had for 1 month. A biopsy of the tumor indicated it was most likely an adenocarcinoma, but accurate preoperative diagnosis was difficult. The tumor was completely removed, along with sufficient margins. Histological examination revealed that the lesion was composed of proliferating epithelial cells surrounded by an intact myoepithelial layer, with no evidence of invasion. The final diagnosis was intraductal carcinoma of the salivary gland. No recurrence has been observed for over 3 years. In conclusion, the difficulty in preoperatively diagnosing this rare entity suggests that complete surgical excision with sufficient margins remains the best treatment option.

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Acknowledgments

We are very grateful to Dr. JKC Chan, Department of Pathology, Queen Elizabeth Hospital for providing valuable suggestions.

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All authors declare that they have no conflict of interest.

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Correspondence to Junya Nojima.

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Nojima, J., Nakahira, M., Yamaguchi, H. et al. An extremely rare salivary gland tumor: intraductal carcinoma of the buccal mucosa. Int Canc Conf J 5, 53–56 (2016). https://doi.org/10.1007/s13691-015-0225-7

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  • DOI: https://doi.org/10.1007/s13691-015-0225-7

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