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Papillary urothelial carcinoma with squamous differentiation in association with human papilloma virus: case report and literature review.

Guma S, Maglantay R, Lau R, Wieczorek R, Melamed J, Deng FM, Zhou M, Makarov D, Lee P, Pincus MR, Pei ZH. Papillary urothelial carcinoma with squamous differentiation in association with human papilloma virus: case report and literature review. American journal of clinical and experimental urology. 2016 Jan 28; 4(1):12-6.

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Abstract:

BACKGROUND: The human papilloma virus (HPV) is a carcinogen known for its strong association with cervical cancers and cervical lesions. It is also known to be associated with a variety of squamous cell carcinomas in other areas, such as the penis, vulva, anus and head and neck. However, the association with urothelial carcinoma remains controversial. Here, we report a case of urothelial carcinoma with squamous differentiation associated with HPV-6/HPV-11. CASE PRESENTATION: This is a case of a 70 year old man who presented with nocturia and pressure during urination. During the TURP procedure for what was clinically thought to be benign prostate hyperplasia with pathologic diagnosis as prostate carcinoma, a 2 cm papillary mass was found in the distal penile urethra. The papillary mass was found to be a high grade urothelial carcinoma positive for GATA 3 expression, with focal areas of squamous differentiation. The areas with squamous differentiation demonstrated koilocytic differentiation, which were positive for strong p16 expression. The tumor was found to harbor low risk HPV 6/11 by in situ hybridization. CONCLUSIONS: This study case demonstrates HPV infection with a low risk subtype (HPV 6/11) associated with an urothelial carcinoma with squamous differentiation and condylomatous features.





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