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Squamous Cell Carcinoma Manifested as a Cutaneous Horn : A Key to Early Detection Kimura, Ryoko 40412647 Sugita, Kazunari Sugita, Kazunari Goto, Hiroyuki Goto, Hiroyuki 70174779 Yamamoto, Osamu Yamamoto, Osamu Kimura, Ryoko Yonago Acta medica　編集委員会 cutaneous horn histopathology squamous cell carcinoma cutaneous horn histopathology squamous cell carcinoma We report a case of squamous cell carcinoma manifested as a cutaneous horn. A 92-year-old man was referred to our department for evaluation of a 3-month history of a keratotic cutaneous horn on the left side of his neck. The height of the cutaneous horn was larger than the diameter of erythema at the base. Histopathological examination showed a hyperkeratotic horn developing over a mass of large atypical keratinocytes with large hyperchromatic and pleomorphic nuclei. Based on these findings, a diagnosis of squamous cell carcinoma was made. A recent study showed that cutaneous horns in association with invasive squamous cell carcinoma had a tendency to have less height than the diameter of the base. In our case, however, the height of the cutaneous horn was larger than the diameter of the base, indicating that invasive squamous cell carcinoma sometimes shows a cutaneous horn that is higher than the diameter of the base. Thus, clinical finding of erythema at the base of the cutaneous horn would be a reliable feature for early detection of squamous cell carcinoma. Tottori University Faculty of Medicine 2018-06-18 eng journal article VoR https://repository.lib.tottori-u.ac.jp/records/4825 10.33160/yam.2018.06.007 Yonago Acta Medica. 2018,61(2), 140-141 http://www.lib.tottori-u.ac.jp/yam/yam/yam61-2/61-2contents.html http://www.lib.tottori-u.ac.jp/yam/yam/yam61-2/61-2contents.html AA00892882 05135710 Yonago Acta Medica Yonago Acta Medica 61 2 140 141 https://repository.lib.tottori-u.ac.jp/record/4825/files/yam61(2)_140.pdf application/pdf 883.6 kB 2018-06-20