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Metachronous occurrence of p16-negative branchiogenic carcinoma and p16-positive oropharyngeal carcinoma Chiaki Nakahama 1 , Kenta Uemura 1 , Chieko Yokota 1 , Nanami Nakajima 2 , Takahiro Okuno 2 , Kenichi Kohashi 2 , Kishiko Sunami 1 1Department of Otolaryngology and Head and Neck Surgery, Graduate School of Medicine, Osaka Metropolitan University Keyword: 鰓性癌 , 扁平上皮癌 , ヒトパピローマウイルス , p16発現 , 中咽頭癌 pp.180-184
Published Date 2026/2/20
DOI https://doi.org/10.11477/mf.091434910980020180
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 We report a rare case of sequential squamous cell carcinomas with different HPV status. A 62-year-old man underwent resection of a cervical cystic lesion in 2020, diagnosed as p16-negative squamous cell carcinoma arising in a branchial cleft cyst. No primary site was detected, and malignant transformation of the cyst was suspected. In 2024, he developed cervical lymphadenopathy;neck dissection revealed p16-positive squamous cell carcinoma. Further evaluation identified a primary tumor in the left oropharyngeal wall, also p16-positive. This case highlights the diagnostic challenges of differentiating true branchiogenic carcinoma from HPV-related oropharyngeal carcinoma.


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電子版ISSN 1882-1316 印刷版ISSN 0914-3491 医学書院

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