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Papillomas of the External Ear Canal: Report of Ten cases in Chinese Patients with HPV In Situ Hybridization

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Abstract

Squamous papilloma is a benign exophytic proliferation which can occur occasionally in the external ear canal. It is widely assumed that the Human Papilloma Virus (HPV) is an etiologic factor of papillomas. Available techniques for detection of HPV genomes include immunohistochemistry, Southern blot hybridization, in situ hybridization (ISH), and polymerase chain reaction. To our knowledge, HPV typing has not been reported on tissue sections of papillomas in the external ear canal. We report HPV ISH analysis in ten cases of papillomas, involving the external ear canal in Chinese patients. These papilloma excrescences were less than 1 cm in diameter, and were benign morphologically. Automated HPV ISH analysis was performed for the hybridization of DNA probes, including both low-risk and high-risk HPV subtypes. HPV ISH results revealed that seven out of ten cases were positive for low-risk HPV (6, 11), three cases demonstrated no hybridization for low-risk HPV probe, and none of the cases revealed any detection of high-risk HPV (16, 18, 31, 33, 35, 39, 51, 52, 56, 58, and 66). On follow-up after 18–29 months (average 24.5 months), eight patients were doing well, with no local recurrence after excision. Two patients were lost to follow-up. Our results confirm that benign papillomas of the external ear canal are associated with low-risk HPV infection with benign behavior and neither recurrence nor high grade dysplasia.

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Acknowledgments

The authors appreciate the expert opinion and assistance of Professor J. Gil from Mount Sinai School of Medicine, in the preparation of this manuscript.

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Authors and Affiliations

  1. Department of Pathology, Eye, Ear, Nose and Throat Hospital of Fudan University, Shanghai School of Medicine, Shanghai, China

    Shuyi Wang

  2. Department of Pathology, NYU Langone Medical Center, New York University School of Medicine, New York, NY, USA

    Herman Yee, Hannah Y. Wen & Beverly Y. Wang

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  1. Shuyi Wang
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  2. Herman Yee
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  3. Hannah Y. Wen
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  4. Beverly Y. Wang
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Correspondence to Beverly Y. Wang.

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Wang, S., Yee, H., Wen, H.Y. et al. Papillomas of the External Ear Canal: Report of Ten cases in Chinese Patients with HPV In Situ Hybridization. Head and Neck Pathol 3, 207–211 (2009). https://doi.org/10.1007/s12105-009-0131-4

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  • DOI: https://doi.org/10.1007/s12105-009-0131-4

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