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・会陰部に中心が白色調で辺縁が黒色〜灰白色調の特異な臨床像を呈した腫瘍がみられ,病理組織学的所見よりBowen癌と診断した.
・ウイルス感染を示唆する病理組織学的所見があり,ウイルス学的検索を行ったところ,ヒトパピローマウイルス(human papilloma virus:HPV)16型が検出された.
・p16蛋白に対する免疫染色では,腫瘍細胞がびまん性に陽性であった.HPV16型遺伝子の発現が,腫瘍細胞の増殖に強く関わっていると考えた.
(「症例のポイント」より)
A case of perineal Bowen’s carcinoma with human papillomavirus type 16 infection
Kamada, Hirofumi1)Miura, Shinpei1)Onishi, Masazumi1)Amano, Hiroo1)Shimizu, Akira2) 1)Department of Dermatology, Iwate Medical University School of Medicine 2)Department of Dermatology, Gunma University Graduate School of Medicine
We report a 75-year-old woman who presented with a 4-month history of perineal nodules and pain on urination. Physical examination revealed a blackish-brown nodule on the lower side of the vulva. Histopathological examination of the nodule demonstrated atypical keratinocytes distributed irregularly from the epidermis to the dermis and koilocyte-like change in the superficial part of the epidermis. The lesion showed positive immunostaining for p16. Human papillomavirus (HPV)type 16 was detected from a specimen of the nodule using polymerase chain reaction, suggesting that HPV had played a major role in carcinogenesis.
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